honestly if i needed money i'd put up an annotation every time the game starts
"<MMOHERE> needs your money to keep it alive! Donate at <LINKHERE> and receive special Donor gear and perks!"
Then give them some nice armor and perks like more taunts or something.
That, or make items purchasable with RL Money and ingame currency.
Or, even better, do what the steam market does. Make people able to sell things for real money, but, you get a little money off of it.
also Lost world was laughably easy minus the loving annoying parkour system
christ it was like trying to play a game where 500 moves were mapped to one button and how you pressed it and when