The latest version of SuperMaxPlayers is EXPERIMENTAL. It has not been tested so please use at your own risk.

Dependencies: Skript + SkQuery
SupermaxPlayers is a new system that is 100% free!

There is a GUI to make things super simple, and you can simple add custom player counts in game, customise connection full messages in game and more coming soon.

command /setplayers & /setconnectionfullmessage:
permission: SuperMaxPlayers.Set

Bypass for max players:
permission: SuperMaxPlayers.connectionfull

After over a year, I updated this skript. I hope you like it and I hope it works as I havent been able to test it.