It's a disappointment, always, when you completely complete an offer or survey and then receive no credit. Once you've completed it, you would expect to be home free with compensation in your account. But it's just the nature of the beast. With THAT many offers and surveys up for grabs to the hundreds of people participating, I think there's a pretty good chance that you would run into a glitch occasionally. The good news is that most of them DO credit. And if one doesn't work, there's another that WILL work to take its place.