I haven’t looked into this game beyond your description, but it does sound like a pretty weird model. Do you also have to pay for cards on top of that?
It’s not a card game, it’s an async autobattler. As long as all the characters are roughly balanced against each other, there’s nothing to be gained other than cosmetics (at the current state of the game).
And then you bring up defederation and/or how instances can die at any time and you lose them again…
At least that’s how it usually goes for me and trying to advertise Lemmy. Not really a fan of “microblogging” to begin with no matter the platform.