That's crazy!!
I get the whole Indie and earn under 100K or whatever per year. But different incomes for different regions and project budgets is getting into silly level of micro management. Sure they might as well say you can't earn more than $500 a day.
How is that even enforced does anyone know? Or is it just something that they could ask for proof to random customers? That's not just for Maya but also Houdini, how do they know everyone is staying within that yearly income limit