To be fair I think half the games on there are scams. The concept of playing a few times then energy running out so you have to buy more, and all the other unexpected in game purchases really get on my nerves.
I've found possibly two or three games that I love, and they were relatively high priced, with a few add on's available buy IAP. EoTE appealed to me because everything was clear cut, with (hopefully) no hidden surprises.