It didn't ask for any credit card info from me. I did see the following in the rules, however: " For those participants who are under 13 years of age, you must have your parent provide their e-mail address and credit card number so that the Sponsor can send a parental notification e-mail to your parent advising them of your attempt to enter a sweepstakes and to authorize your entry."
Sounds like they really want to discourage entries from the under 13 crowd. I too, wouldn't enter if I had to provide a credit card number.