Game streaming is a massive loss leader (you can see this reflected in the increasingly slim per-month usage limits multiplied by the rising subscription prices), video at scale is far from a solved problem. Even with 8-12 simultaneous encodes per GPU (or iirc about double that from the accelerators) getting the density per rack to actually support the number of concurrent players required to approach being a commercial success is still very far away. This also ignores the very real logistical constraints decently routed bandwidth.