Unfortunately,
I think the paid relay model for broader consumer adoption is going to be a non-starter.

People are used to being ‘the product’ and expect things for cheap or free: tv shows, email, etc.

Eventually someone will figure out a #nostr on-boarding model. Likely, it will be an app like Satlantis that acts as a reverse Trojan Horse into the network.

I think whoever figures out how to give someone at the outset: a reputable name on the #nostr network along with a starting balance of funds (satoshis to spend) will win big-time. The best example so far is primal by miljan and team, starting off as a social media app, but early in its life that it could pivot when the
opportunity presents itself.