I guess what they do is reduce the server capacity on servers when player base drops in times without new content, and don’t adjust server capacity back with new content patches.
really bad management. But this issue was already present from the very first second the game went online.
You weren’t able to play because the client and servers couldn’t handle the several thousands of players.
Same happened e.g. for Bless Online, although they could guess how many ressources they’d need because it is a buy-to-play Steam release.
Imo there is no point in a game being MMO if it can’t provide these multiple players with the ressources to play.
If they want to save money on ressources, they should actively hunt down bots that actually waste server ressources for not being active players.