I completed several offers but have not received any credits. I filled out some surveys and have received no credits. Last week, I took advantage of the offers for Peets and Groupon. However, no credits have appeared.
When I went to the "Support" link for not receiving credits, I am sent to a TrialPay page that says to back to the game/site and click Support. With this circular setup, I have no way to contact anyone about the issue. With these two offers that I spent money for, I was supposed to get 800 credits.
From my experience, it seems the offers do not actually deliver on their promised rewards.