Everyone is so pessimistic or negative 😂 People complain if a developer makes money through skins and battle passes, people complain if a developer charges money for a game. They can't win.
If the developers keep adding more game modes and ways to play, then I think the game has a lot of potential to be around for a long time. As long as they don't fall into the Fall Guys trap of not having enough game modes for ages.
I read it had about 105k people on PC at launch and still gets around 60k each day on PC. That isn't taking into account Xbox players. No doubt they'll launch on Playstation and Switch too, which should also keep player numbers up.