If Microsoft is firing Xbox employees to keep the lights on, they're not going to hand Valve 30% of their subscription revenue. It's why they're pushing for open stores on all hardware - Xbox, iPhone, PlayStation - because it removes these types of cuts and allows them to profit directly from other people's hardware base. Steam is different - its a platform within a platform. Microsoft can't force Valve's hand here, so, either Valve comes down from their cut or Microsoft keeps Game Pass off of Steam.