MVSTONER69:
Just get used to it. If I had all the credits that I performed but didn't receive I'd have about 2-3000 more credits than I currently do have. I would be willing to bet I'm not the only one. When I'm "fishing" for credits I probably have about 5-10% every day that does not reward, and I'm just doing the simple stuff, nothing that requires what you did.
+1 The serveys that didnt pay out or the videos as well . Personally I wont do any offers that require me to do anything extra . Some of the offers will be nothing but rip offs and nothing more . Anything above giving an e mail address or viewing I wont touch . But at the same time there are many offers that will and do payout .
You can try to get the credits by contacing the ad sponsor and reporting the problem to them . Also I would suggest that you do not do any of the offers that require you to download any programs as you will get a bunch of junk piggy backing on those programs and it will mess up your computer big time .