BMF.io does check in on high-earning publisher accounts every now and then. It's just their way of making sure everything's legit and running smooth. If you're making good money, they wanna be sure the traffic is clean and you're following the rules. It is actually kinda normal when you're doing well. As long as you're not doing anything shady, you're good. And if they do review your account, they'll usually hit you up for some info or clarification before doing anything serious.