I posted similar about the hopper limit, but with this spawner limit the server could have an in game currency shop where the player has the ability to upgrade their island, for example bigger area, more spawners and things such as that, I just think that will give much more motivation for people to try and make money on the server and try to even become self sufficient
This already exists but in a different way When you expand your island you get more limits. so if you had 99x99 and lets say you were only allowed to play 4 Pigmen spawners then if you have a 149x149 you could place 6 and 199x199 you could place 8 I know theirs a thread out there but I couldn't find it here's one on the topic though Zombie Pigmen & Gold Blocks | Skyblock Forums Edit: I made a graph about it