In all games I've played so far you do need to invest money to generate at least some type of profits and usually you have to invest a significant amount of money to really receive enough rewards.
The only one I've seen so far that was worth investing in the early days is ChainzArena. Their native token, SOUL went from 0.08 EOS to 0.24 and daily users are also a relative big amount.
Yeah, a lot of blockchain game revolves around p2w model of normal MMO when you hit/invest to a certain threshold, your investment finally has return profit. Since that turn of me most so I don't play any blockchain game but from your suggestion, maybe I should give that game a try. Thank you.