Turns out that no advertising, rent land, sell memberships works.
Personally I see it as a reason why the current metaverse schemes are a scam, since there are numbers right there that profit is from selling what are essentially indirect server rentals (that becomes more profitable as time goes on as server prices drop). Rather than a one time 'crypto' purchase silliness, that scammers have essentially set their sites on.
For a rather primitive example: look at Roblox (the closest functional approximation of a proto-metaverse) and see how much money some Roblox games can make. In 2020, Roblox devs generated about $328mil in revenue, with 32 of them getting paid over a $1mil. And that's not even mentioning that a lot of them were made by one person.
This is a pretty good deal for the users, but it's not going to pay for a Meta quantity of developers.
Yet if they put in all the mobile money extraction mechanisms into it, why would people choose Meta's product over VRChat?
Seems a bit much.