I think the most successful blockchain game is the Sorare. If you like football, then this fantasy game is perfect for any fan. You feel that every dollar you throw into this game doubles in a few days. It's based on ethereum and I'm really stuck with it like thousands of people. If you want to register, it is better to do it through a referral in order to win your first value card for free. My link is this if you are interested in entering the game. sorare.com/r/jkernel
You can also read my article to understand what I mean in terms of profit. @jkernel4/sorare-the-future-of-profitable-blockchain-games