That, or it remains free to use, but offers optional paid features. Seems to work well enough for free-to-play video games; Fortnite is presumably a decent enough money maker for Epic Games, for example.

This is almost Reddit's model (with Reddit Gold, and now the various other comment/post awards added recently), except Reddit also sells ads; it'd be interesting to see if the awards alone are enough to keep the lights on absent a need to appease investors.