Very money hungry

Stuvia doesn't pay out your earnings if they're less than a certain amount (€10). They take your earned money away when you don't log in for a year, which they don't warn you about (€5 a month!). They are not transparent, it's very hard to find specifics about their policies. They ask a commission from the buyer, then also ask a commission from the seller for that same sale.

The website notes that you could save money by buying store credit, but doesn't say how much you would actually save. Then, again, you can't get a refund of the store credit if it's under €10.

It all makes them come across as shady and quite ********* when it comes to how your money is kept by them.