I mean recently theres been Free MVP/VIP weekends every month... xD and surprise-surprise thats almost only times we had a nice and healthy number of people on the server.
People need A LOT of incentives to play these days, many people leave because they find being a zombie boring, sure it may be boring more times than not, so something needs to be added to motivate players to be zombies. e.g. Zombie leaderboards with rewards, for example top 3 after each month get something cool, VIP, Greeting, a random loot box that can give them shit like customized camos, starting points, etc
i dunno, its tough, black ops 1 ageing isnt helping
I mean its obvious i would be #1 every month, but you know... 2nd and 3rd place up for grabs