Used to work, doesn’t anymore

This app used to be great. It was only 2,500 coins to get a $5 reward, now it costs 5,000. This isn't that big of a deal even though it takes double the time to earn coins, but now it won't let me earn anymore than 3,700 coins. Its been doing this for weeks and it keeps resetting me to 3,000. I'm done with this app and am deleting it. If your having this problem, you should too.