This is actually a really cool idea. Maybe they could find a way for players to purchase something in the stores and a percentage of the proceeds will go to whatever organization is chosen. I dont spend money on this server right now and havent in years but if there was something like this where i would be donating to charity and getting in-game perks I would definitely do it.
Maybe we could do this as an annual thing. The community chooses a global issue to help with donations via a poll and on the 4th of July (or any other 50% sale day) a percentage of the servers profit gets donated. I bet it would help the server too