This game was great until they changed the purchasing system. I had grinded to get enough to buy a background and now when I come back to the game you either have to pay for it, or play games in order to tier up to buy them. What are my points even for??

This game was great until they changed the purchasing system. I had grinded to get enough to buy a background and now when I come back to the game you either have to pay for it, or play games in order to tier up to buy them. What are my points even for??