Why not the streaming model? Seems like it'd work nicely with subscription.
Always thought the appeal of Stadia could have been I could try a large variety of games on any platform and not have to deal with installing them (especially for AAA games, though indie games can also get giant).
Streaming is very capital-intensive and requires significant tech investment and potentially code changes from developers. Being a marketplace operator is asset-light - you develop a minimal IP (the marketplace app) and, if the product is desired, marketplaces are viral, enabling rapid growth. A marketplace that's sufficiently large allows a small company (how many people are needed to build the Spotify apps?) capture revenues from a very big market (nearly every musician in the world, alive or dead). it's a way waaay better business model.
Also, Google tried streaming, NVidia tried streaming, both have had little success. Imagine going to your YC partner and saying "yeah, I know google and NV tried it and failed, but we'll succeed, because... it's indie games?"
Placed it really well! Ultimately, it comes down to the business model. Streaming is very capital intensive and requires more tech built out, both from us and the devs (adding barriers to entry to MagnaPlay).
Streaming is definitely going to be something of the future, we just don't think it is 100% there yet, costs still need to drop a bit further.
Always thought the appeal of Stadia could have been I could try a large variety of games on any platform and not have to deal with installing them (especially for AAA games, though indie games can also get giant).