Oh this is indeed a very interesting concept. Iota seems viable considering their tangle technology. I too have experienced my 2 daughters signing up for steemit but quickly loosing interest and returning to FB simply due to lack of tools and user incompatibilities. This was a huge disappointment to me as they both spend most of their time on social media platforms...
Peace,
The Last Sage
Yes, communities will help, but there are a lot of issues with the signup and landing page. If you stay long enough you get used to it. :)
If they were making money with it I think they'd soon be back haha.