The only way to stop money pit games like this on the site is to quit giving them money. I don't have a problem paying a couple of dollars to a game like this, but the concept since this update is quite ridiculous. You could potentially pay a hundred dollars to level up a 3-4 star hero based on the randomness of the current tavern. That's great for the developer trying to make a quick buck, but sucky for anyone on this site trying to play a fun cheap game.
I get so sick of this crap. If I wanted to pay to play a game I would go by one these are supposed to be free. Not pay and get added in game bonus grrrrr. I give up 360 on skyrim time.