basically, they're stopping people from spamming - they're limiting you to signup within a 24 hour period from the looks of it, and they're only advertising it on the SG1 site, not SGA, which they've barely updated. But, this means you need to watch the show LIVE, I guess, and not check out your TiVo on Sunday. Another way to boost ratings. 
Not full rules - woudln't fit.
NO PURCHASE NECESSARY TO ENTER OR WIN. VOID WHERE PROHIBITED OR RESTRICTED. You will be charged $.99 for every text message you send plus standard text messaging rates, which will apply to each text message sent or received (contact your carrier for pricing plans and details). You can also play for free by entering online at www.scifi.com/getinthegate/.
Eligibility: The Get in the Gates Sweepstakes (“Promotion”) is open only to persons who, at the time of entry, are legal residents of, and are physically present in, the fifty (50) United States and the District of Columbia and who are twenty-one (21) years of age or older. Employees of Universal Television Networks, Inc., NBC Universal, Inc., and GoldPocket Interactive, their advertising and promotion agencies involved with this Promotion, and their subsidiaries, divisions, affiliates and related companies, immediate family members and/or those living in the same household of such employees are not eligible to participate or win. By entering the Promotion, participants are bound by and agree to these Official Rules. All federal, state and local laws and regulations apply.
Promotion Period: The Promotion begins at 8:00:01 PM (ET) on April 13, 2007 and ends at 11:59:59 PM (ET) on August 3, 2007 (the “Promotion Period”).
Promotion Description: During each week of the Promotion, during the first run airing of each 9 PM (Eastern and Pacific Time) Saturday Night Movie (the “Show”) (check local listings for dates and times when first run episodes of the Show will be aired), at a predetermined time in the broadcast (approximately in the first thirty minutes of the Show) viewers will be invited to text “GATE” to enter to win the Grand Prize. All viewers who respond to the invitation will be entered to win the Grand Prize.
How To Enter by Cell Phone: If you have a text messaging capable cell phone from a participating carrier, you may enter the Promotion by responding to the on air solicitation once prompted by the promotional spot, by sending a text message to the short code 72434 with the text “GATE”. A premium text message charge of $.99 will apply to each text message sent to enter Promotion. In addition, standard text messaging rates apply to the entry and all other text message entries sent and received in connection with the Promotion. You will receive a “thank you” text message the following day including a confirmation that the message has been received or an error message noting delivery failure. If you get an error message, please try again. You may stop receiving text messages at any time by responding “end”, “stop” or “quit” to the thank you text message or to any of the messages. For every “GATE” message submitted via text messaging, you will receive one (1) entry into the random drawing to select the Winner. You may respond to the invitation after the on air solicitation has been made during the first run of each episode of the Show during the Promotion Period until approximately 9:00 AM ET the day after the first run of each episode of the Show during the Promotion Period. Please use caution and do not drive while entering the Promotion.
Free Method of Entry Online: To enter the Promotion without using a text messaging capable cell phone, visit www.scifi.com/getinthegate/ and complete the online registration. You may submit your registration after the on air solicitation has been made during the first run of each episode of the Show during the Promotion Period until approximately 9:00 AM ET the day after the first run of each episode of the Show during the Promotion Period.
Entry Limitations: LIMIT 10 ENTRIES TOTAL DURING THE PROMOTION PERIOD: Regardless of the method of entry, you are limited to a total of ten (10) entries per email address/cell phone during the Promotion Period. So, for example you can (a) enter up to 5 times on your cell phone and 5 times online, (b) enter once on your cell phone and 9 times on line or (c) enter up to 10 times on your cell or up to 10 times online. Entries from the same person in excess of ten (10) will be disqualified.
WINNER NOTIFICATION: Grand Prize Winner will be notified by cell phone and/or email. Sponsor will make two (2) attempts to contact the Grand Prize Winner at the phone number or email address provided online or at the cell phone number used to enter within 72 hours from the time of the Grand Prize Winner’s selection. If Sponsor is unable to reach a potential Grand Prize Winner via phone or email within this time frame, he/she will be disqualified and an alternate will be selected. Grand Prize Winner will be required to complete, notarize, sign and return an Affidavit of Eligibility and Liability ("Affidavit") and a Publicity Release (“Release”) within 10 days of delivery. If the Affidavit and Release are not returned within such time period, the prize will be forfeited and an alternate winner will be selected at random from among all eligible non-winning entries received. Prepaid overnight mail service and a fax number will be supplied to the Grand Prize Winner. If any prize notification letter or prize is returned as undeliverable, the corresponding prize will be forfeited and awarded to an alternate winner. Acceptance of prize constitutes permission (except where prohibited by law) to use winner’s name, hometown, and likeness for promotional purposes in any and all media (including online posting) without additional compensation.
Not full rules - woudln't fit.NO PURCHASE NECESSARY TO ENTER OR WIN. VOID WHERE PROHIBITED OR RESTRICTED. You will be charged $.99 for every text message you send plus standard text messaging rates, which will apply to each text message sent or received (contact your carrier for pricing plans and details). You can also play for free by entering online at www.scifi.com/getinthegate/.
Eligibility: The Get in the Gates Sweepstakes (“Promotion”) is open only to persons who, at the time of entry, are legal residents of, and are physically present in, the fifty (50) United States and the District of Columbia and who are twenty-one (21) years of age or older. Employees of Universal Television Networks, Inc., NBC Universal, Inc., and GoldPocket Interactive, their advertising and promotion agencies involved with this Promotion, and their subsidiaries, divisions, affiliates and related companies, immediate family members and/or those living in the same household of such employees are not eligible to participate or win. By entering the Promotion, participants are bound by and agree to these Official Rules. All federal, state and local laws and regulations apply.
Promotion Period: The Promotion begins at 8:00:01 PM (ET) on April 13, 2007 and ends at 11:59:59 PM (ET) on August 3, 2007 (the “Promotion Period”).
Promotion Description: During each week of the Promotion, during the first run airing of each 9 PM (Eastern and Pacific Time) Saturday Night Movie (the “Show”) (check local listings for dates and times when first run episodes of the Show will be aired), at a predetermined time in the broadcast (approximately in the first thirty minutes of the Show) viewers will be invited to text “GATE” to enter to win the Grand Prize. All viewers who respond to the invitation will be entered to win the Grand Prize.
How To Enter by Cell Phone: If you have a text messaging capable cell phone from a participating carrier, you may enter the Promotion by responding to the on air solicitation once prompted by the promotional spot, by sending a text message to the short code 72434 with the text “GATE”. A premium text message charge of $.99 will apply to each text message sent to enter Promotion. In addition, standard text messaging rates apply to the entry and all other text message entries sent and received in connection with the Promotion. You will receive a “thank you” text message the following day including a confirmation that the message has been received or an error message noting delivery failure. If you get an error message, please try again. You may stop receiving text messages at any time by responding “end”, “stop” or “quit” to the thank you text message or to any of the messages. For every “GATE” message submitted via text messaging, you will receive one (1) entry into the random drawing to select the Winner. You may respond to the invitation after the on air solicitation has been made during the first run of each episode of the Show during the Promotion Period until approximately 9:00 AM ET the day after the first run of each episode of the Show during the Promotion Period. Please use caution and do not drive while entering the Promotion.
Free Method of Entry Online: To enter the Promotion without using a text messaging capable cell phone, visit www.scifi.com/getinthegate/ and complete the online registration. You may submit your registration after the on air solicitation has been made during the first run of each episode of the Show during the Promotion Period until approximately 9:00 AM ET the day after the first run of each episode of the Show during the Promotion Period.
Entry Limitations: LIMIT 10 ENTRIES TOTAL DURING THE PROMOTION PERIOD: Regardless of the method of entry, you are limited to a total of ten (10) entries per email address/cell phone during the Promotion Period. So, for example you can (a) enter up to 5 times on your cell phone and 5 times online, (b) enter once on your cell phone and 9 times on line or (c) enter up to 10 times on your cell or up to 10 times online. Entries from the same person in excess of ten (10) will be disqualified.
WINNER NOTIFICATION: Grand Prize Winner will be notified by cell phone and/or email. Sponsor will make two (2) attempts to contact the Grand Prize Winner at the phone number or email address provided online or at the cell phone number used to enter within 72 hours from the time of the Grand Prize Winner’s selection. If Sponsor is unable to reach a potential Grand Prize Winner via phone or email within this time frame, he/she will be disqualified and an alternate will be selected. Grand Prize Winner will be required to complete, notarize, sign and return an Affidavit of Eligibility and Liability ("Affidavit") and a Publicity Release (“Release”) within 10 days of delivery. If the Affidavit and Release are not returned within such time period, the prize will be forfeited and an alternate winner will be selected at random from among all eligible non-winning entries received. Prepaid overnight mail service and a fax number will be supplied to the Grand Prize Winner. If any prize notification letter or prize is returned as undeliverable, the corresponding prize will be forfeited and awarded to an alternate winner. Acceptance of prize constitutes permission (except where prohibited by law) to use winner’s name, hometown, and likeness for promotional purposes in any and all media (including online posting) without additional compensation.