I'm afraid so.
also RE: Passports to Fun and similar places. I've done about 3-4 offers like these for points on another site, the points come in quickly. Be careful when you call the passports to fun automated system to cancel. You will click to cancel and it will offer you a yearly subscription instead. Don't press 1 to choose that, just wait about 5-15 seconds until the cancel option comes up again. It's easy, but sneaky.
Generally:
Call number, enter info: (mem #, cc # or phone #)
Press 1
Press 1
wait (this is where they try to get you to "cancel" a monthly membership, and join yearly)
press 2 to hear other options (it will say what they are, it will offer cancel)
cancel
confirm - enter zip#
Also, when I did the other ones (the ones with the + at the end and offered a $25 gift card), since I had already entered for the first one (passports) it gave me this msg:
(the credit card info was right, btw)
However, I was still credited. (this was on ipodsweepstakes, though, but I'm hoping it works here too.)
I couldn't tell if it "really" didn't go through, so I was paranoid and called anyway. Oh, looks like I have to cancel those too! eek!
Anyway, numbers I've accumulated for cancel:
Today's Escapes+ - 1-800-798-0664 (automated)
Passport to Fun+ - 1-888-999-0557 (automated)
SavingSmartSM - 1-800-316-8774 (easier online but you can confirm again by calling - automated- must have membership #) savingsmart dot com
At Home Rewards+ - 1-877-636-6858 (automated)
Valuemax - 1-888-205-2257 (automated)
hth!