I'm going to take a stab at some rough math to show the sustainability or not of a $10/mo subscription rate. This is a starting pt. I didn't dig deep. But I didn't blindly use these numbers either.
A $10/mo subscription rate generates $1.2 billion a year per 10 million subscribers. For a 100 million install base where every console is a subscriber, that is $12 billion/yr.
IN 2018 videogame revenue in the US was $43 billion. I believe that is console only and game sales only.
The PS4 and Xbox One combined had an install base of 135 million at the end of 2018. Switch had 32 million install base at the end of 2018. Let's just say for simplicity's sake and rounding up, the install base of 2018 was 170 million consoles. and we'll ignore software on other consoles at the time and ignore the fact that this was the year ending install base and not average install base of the year. Also we're ignoring consoles that are part of the same household, duplicating in the same household, all the used ones sitting on shelves at a GS etc.
If those 170 million consoles paid $10/mo then that would generate around $20 billion a year.
Those 170 million consoles are worldwide install base numbers and yet, just in the US, videogame sales in 2018, according to the link, were $43 billion in the US.
Thus even if every console in the world subscribed in 2018 at $10/mo to a Sony Pass or GamePass or NintendoPass, it would only generate 47% of the the video game revenue generated in the US alone.
Just something to think about.