When real money is involved on the internet the worst kinds of stuff results, and it takes a lot of effort to avoid it. How's that going to work?
None of this is to take away from your accomplishments here, by the way. The exact opposite in fact, you've got an interesting enough idea that it prompts interesting questions of the mechanics.
P.S. do you have any long-term plans to IPO this if it becomes successful? If not, some kind of guarantee that this platform is immune to enshittification would probably be very, very popular.
What will be interesting is how they are incentivised differently. Different people attach different relative value to fake internet points and less-fake currency points, so you'll get different behaviour from different sets of people.