You likely did offers that required something you didn't follow through on 100% (or at least in their eyes you didn't). I've seen some offers on there where it says to open an account for 30 days or some other amount of time, then in the fine print it says credits will be deducted if you cancel early.
I've seen nothing but bad reviews and experiences with Revu so never tried them and stick strictly to TapJoy. I've had issues with TapJoy too, but they are always resolved once I file a CS ticket. I've never heard of anyone having success with Revu CS.