The cool thing about percentages is that they obscure actual usage. The people using a given service can go from 100 to 200 and that would be a '100% increase'. Notice how Xbox execs exclusively deal with percentage increases, and weird fake metrics like 'hours streamed this quarter'? Microsoft doesn't charge by the hour so if anything this is a bad thing lol, every hour streamed is a cost, the ideal subscriber is one that never uses the service (btw this is the only thing that keeps subscription services afloat).
So what I mean to say is: taking financial statements from earnings calls at face value is not a very good idea. If you went by those Xbox would literally always be in good shape, because despite all their problems their earnings calls still look rosy.
But anyway, I don't see Gamepass getting all that popular on PC. Games are incredibly cheap on PC, even cheaper than Xbox which is the cheaper of the two main consoles (Nintendo is it's own thing). With most games being broken on release fewer and fewer people care about playing 'day one' and just wait for the game to be fixed and on sale for 50% off on Steam. That also brings up another problem: with MS running it's own (inferior) platform, even people who are intrigued by GP are unlikely to want to leave the Steam ecosystem, which as any PC gamer knows is basically a permanent fixture in the PC gaming space.