Plutonium

There is nothing forcing a single script or anything like that so they simply put several .gsc files (scripts) in the scripts folder

Only limitations would be game engine's limits (loading too much models for example) or scripts conflicting, such as 2 mapvotes running at the same time for example

You can only load one mod but scripts are completely different and they're server side only

that should be enough to run 5 servers plus IW4M, if you are looking to only run 2-3 servers id recommend a place like plasmanodes. you could run 2-3 servers with IW4M with ddos protection for like $15/month. good customer service as well but you will be limited to miami host location

That would be fun but plutonium is just servers for normal cod and bo zombies servers. It doesn't change anything about the og game itself. No Cap. For things like that. You have to install or create mods. Facs

JezuzLizard this is still ongoing.

Covanent The developers have said that although it is implemented, it is broken. so nothing can be done until they fix it.

Google cloud vm compute engine