One of the problems with the fediverse(s) is that there are in fact cash costs to compute share, and we can't wave it away with VC and ad revenue. There's no economy of scale and complete self-hosting costs hundreds/month even if your admin&mod team is volunteers.
Which is why I'm really keen to see Canadian-built SMEs like https://GoFedi.com joining https://FediHost.co offering pocket-change-coffee-money price points for managed hosts!
they do the sysops, you manage your instance.