"Today, PlayStation revealed that its PS5 has sold 40 million units. Microsoft doesn’t share hardware numbers typically, but court documents, math, and slides from an ID@Xbox in Brazil seem to suggest the Xbox Series X|S line-up is around 20-23 million units sold globally. That essentially puts the PS5 at a 2:1 advantage against Xbox, but perhaps the split is even worse than that beneath the surface. "
Also, at least in the X360 times some games wouldn’t have dedicated servers, instead hosting matches on the console of one of the players.
And you would be paying. To host the server on your own machine.