Simple. With the same model.

People pay for reach (advertisers, boosters, even new accounts). That will NEVER change.

So take that money, and fund:

-Creators
-Clients
-Relays

And hell, even fund the consumers of content with it. Get paid to view ads. Don't want ads? Turn them off and get no money. I'm already trying to plan this out but need to understand the lay of the land more. This is how you #GrowNostr