If a pool with high minimum payout stops servicing a coin (XVG), is has to payout the miners in the same moment or...
Each and every sh*tcoin around can be hacked, forked or f*cked up some other way or simply die forever, at any arbitrary moment, taking along all its earnings, payments, wallets, etc. It's a part of the current cryptocurrency gambling. No sane pool-owner would guarantee the opposite or take any responsibility of that unlucky sh*tcoin's devs.
However zergpool's owner could deactivate that XVG coin a bit earlier, not waiting for several hours.