I honestly don't see how this is restricted, since it actually doesn't spawn zombies when there isn't a minigame, so idiots can't spam the server datablocks or whatnot with zombie spawns with zombies on them.
Also, I like how it checks to see if players are near the spawns. I'd rather have no zombies near me then a loving witch spawn in front of my and raping my stuff. Seriously, how do you deal with that? inb4dealwithit
Anyways, I'm glad ZAPT was made, but that's just my opinion. I hope Iban can make Version 3 possible, and with a few new features and fixes.
Rooting you on Iban! >.<