Agree with your point about buying platinum being more of a token of support for the dev team, I agree. I wonder how well the studio is doing moneywise.
7000h is crazy. I've been enjoying my time with the game for sure, but it does get quite repetitive imo. It feels a lot like Diablo 3, in a way, because you don't really have to think a lot about the individual enemy encounters and the moment-to-moment gameplay but more so about theorycrafting a certain build and building up resources to afford it. It's still fun for sure, don't get me wrong, but the gameplay itself is not suuuper engaging, really.