That's a big part of it. Right now, Microsoft tries to put a number of big titles in their subscription service, a bunch of filler titles they can buy from publishers for cheap, and maybe a few that sold more popularly than they expected.

If subscription gaming becomes the majority, Microsoft and other streaming providers get to pick the contenders and not much else gets seen. Games like Lethal Company won't have a sudden boom in popularity because it wasn't on Microsoft's radar.