Talented Dota 2 fans have the opportunity to create their own custom game modes. Some have decided to make money off them, which Valve is not very pleased with.
It turns out that Valve's lawyers are reaching out to Dota 2 custom mode creators, demanding that they remove monetization. They have been given a deadline of August 17.
Valve defines “monetization” as including various battle passes, subscriptions, items, skins, currencies, and the like. At the same time, payments may be processed through a third-party partner (bypassing Valve).