Paragon has anywhere from 100.000 to 400.000, a lot of those are PC players while some are on PS4.
There’s also a lot of modders who have launcher installed for the other games.
Developers buy games too, one going through marketplace may end up buying games as well.
The problem are the hosting costs, but there’s moneis in there for Epic if they manage to do this; but they are so focused on Paragon and Fortnite that I believe their interest on something like this is close to zero 