I actually have an idea. It's not the sweeping 'empty facebook' sort of idea, but...
Transport a (more) forum to Hive. It'd take front end development, but really forum architecture is pretty basic. Bring them in, give them enough VP to vote and comment and show the money line in the small print at the bottom. I belong to at least three of the things, the largest of which has several hundred thousand members that represent 25,000 comments per day. That group even publishes an on line magazine that is based partly on posts from members...
If they want to be 'just' forum users they can be. If they want more, it's there. The 'forum ownership' could benefit by making some 'money' instead of just paying ever increasing server bills. There's a lot to be said about it, but you get the basic idea. Plus it would be a massive 'instant community'.
It could be a 'softer kinder' way to onboard the general public... And I'm sure we'd get a % as 'full users'.
@TokenBB was meant to do this on Steem, but the project seemed to lose wind in early 2019. A forum would be great and tied in with communities it could be a fantastic system.