Let me explain something.
If you add a ball as admin, it spawns EVERY round automaticly. You can only add one ball at once. Mottzi is not dumb. Hes a very known coder in CS:GO and CS 1.6. He does this like 8 years or so ^^ Player CANT add balls unless they have the admin ban flag. Which can be modified if you want...
So:
Only Admin can spawn the ball.
Players cant.
If you spawn the ball on a map, it saves automaticly in a config file located in sourcemod/configs/ballspawns.cfg (if you want, you can use the Z Flag so everyone who has the Z Flag (which is root access) can add a ball on the specific map)
If u type !ball as a normal player, it only says like: Ball plugin by mottzi. Ofc you can remove this as well since he added the sourcecode to alliedmodders
I hope that explains all...
Also, this plugin is currently on almost "every" known Jailbreak server.
Its still up to you if you want this or not. Im not forcing you to add it but i realy like to help jailbreak servers/communitys.