Bed wars came out before egg wars existed so they are technically not copying. At this point egg wars has been around long enough where it will be the next survival games/skywars. Every minigames server has one of those but you don't see people complaining about them copying the server that originally came out with those games. It was only a matter of time for large servers to start using a game like eggwars. It's a popular game enjoyed by many people so servers want it especially server networks which aim to be the one server that you play on.