I just copy my post from another thread.
Number of game owners according to Steam spy:
-> POE 1 is between 1-2 mln
-> POE 2 is between 500-1mln
-> Pathfinder is between 500-1mln
-> DoS2 is between 2-5mln !!!
The situation is worse if you look at other statistics.
Unfortunately, old school games are not popular.
Only PoE 1 sold over 1 million copies because it was one of the first classic RPGs in this decade. POE 2 sold much worse.