[SiempreViernes]

> I considered a model where users could pay to access celebrity posts.

Why would celebrities be on your platform if you lock the audience away from them?

Also, celebrities with public accounts are ultimately just doing advertising for themselves (and whoever pays them), so you haven't actually escaped the realm of ad-funded networks.

When you "own" a "social network" the fundamental asset you have is the audience, and only people with something to advertise are willing to pay for access to it.