Pretty Simple, for milestones such as teaching like 24 hours on the server players should be rewarded through cosmetic items. I think the colored crowns that were on chronet could look nice with a reboot

https://i.gyazo.com/9ff0bc32ee65e16be887f03b72743f3b.png

Other Milestone Ideas:

-Reach 1 Million Dollars

-Reach 100 Items sold through a register

-Mine 1000 Iron..... Etc.

So basically like an achievement system with rewards? Sounds like a good idea to be honest.

Yeah pretty much, obviously the items would either need to take no weight in the players inventory or require minimal weight,Also the items wouldn't be able to be traded due to it being an achievement for players to achieve and it wouldn't make sense to give someone else the item if they hafnt achieved it