Hello. I have been a member at ipodsweepstakes.com for quite a while.
Yes, it's true that sometimes, you do not get your credit. You should know, however, that this is not the fault of the ipodsweepstakes site or their management! This is a problem from the people who you signed up with for credit. I had a problem with NetFlix too, and when I sent a support ticket to ipodsweepstakes about getting my credits, they said they were sorry for the delay, and credited me immediately.
People should realize how this system works. The advertisers that sign up with ipodsweepstakes agree to inform ipodsweepstakes of membership validation. In many cases, the reason you won't get immediate validation is because you used different personal information on the signup site, than you did with ipodsweepstakes. If you email is different, they can't verify that it's you, and Netflix, for example, can't confirm it. This is what happened to me. When I signed up with netflix, I used a different email than I used with iPodsweepstakes. When I asked ipodsweepstakes about it, they responded quickly, and credited my account.
I hope that helps!