What would be the best way to store ban data across multiple games NOT places?
Since DataStores are only available across multiple places in a game/universe, I think hosting a server would be the best way. Though, if so, where could I safely host a server for cheap? Any help would be really appreciated!
So, as you said the best way to suggest, you may use any secondary website or any other media.So if you want your data to be automated data not manually ban people, you would do something like posting in discord using https service.
Since its not manual work, then its better to make a group game as all group games are owner by the group.You can have some things in game to send data across them all.So if you wanna do auto work you may check developer roblox.
As many other games have this system, its possible but just hard to make.