The ability to buy in game ranks (like freeman and stuff like that). This would be good for the people who can't PvP well and don't like mining so they can get to the free world quickly.
Maybe reales those hidden mines u have hidding at the right side of spawn Or sell mcmmo like 5$ for 50-100 points Or /kit mcmmo gives you 10-25 mcmmo points per 1-2 days and like many people have suggested /kit golden apple like factions but with 5 instead of 3 that's all I've come up with and yes there are secret mines to the right side of spawn free cam and u will see them
I know some of my suggestions have been said but these are mine: /kit godpick every so often /kit prot4 cooldown can be from 1-2 days. In game money, come on. /kit sharpvaxe The ability to buy /tpa if you're not a Citizen already I can't think of much more, if I do I'll edit this post.
Few ideas, A kit for op pick, such as efficiency 5 fortune 5 unbreaking 5 Kit for obby Kit for pvp/apples Another idea, if you could have a legends black market, or add to the black market. Such as the pick stated above for 25 million in game money or so. I completely understand, you want to make real money on this server. However, I think it might benefit the server if the richer players have items to spend a lot of money on as well. It can also help keeping the inflation on the server down.
How about you add a donator mine and in the extras section people can buy access to it for $5 - $10. Note, that this could be one out of a few Prison packages.