@ernest While umbrella plattforms are great, if you want to think in the longterm, I wager this is something you might want to evaluate a bit. People may dissagree, but I think that in the longterm the fediverse will look much more like email, being a ecosystem of single providers, instead of a plattform consisting of many sub-providers, although there probably will always be space for it.
Umbrella platforms are great if you don't have a lot of infrastructure and capital as you can get a lot of horizontal growth without having to invest in it yourself. But in the long term this is a battle for the one big forum provider, the place people will go to have reddit-style groups in the fediverse. If you are smart and want to beat Lemmy to the dust I'd just push donations, and really build Kbin.social and make that your whole thing.
This is also way better for new people that are not familiar with the fediverse and instances, checking out Kbin.pub, which will make the onboarding that much more efficient than your competitiors.
This is also the direction Mastodon is going, and later also where Pixelfed is going, after I've pestered him for years.
Don't waste your time and jump over all the hoops. Kbin has so much potential, and going as the opensource hotmail/gmail "reddit" of the fediverse is the future! B-)
Anyway, I have great faith in you Earnest no matter how you do it. Go rock the world!