I love the idea, above by @cryptoeater, but I think on the whole, STEEM desparately needs to be simplified - especially the money/rewards aspects.
For any social platform to achieve mass adoption, there needs to be as little friction as possible when first joining. I'm about a month in now, and every time I find an answer to a question I have about the platform, it opens up another can of worms. I have so many cans open, I can't keep track of them all - and I consider myself to be relatively tech/social media-savvy and fairly intelligent.
Finally, I understand your point completely about dolphins and middle-classes needing the scope to grow, but [without wanting to get political] I think you/we need to stay away from calling them "the middle class" - it's never nice to hear as a member of the "lower classes" ;)
This is one of the main reasons why I believe that Zappl and D.Tube will be the apps, at present, that feed more people to this blockchain. Steemit is simply more complicated and a larger learning curve for people. There is a time that it takes to not only learn the compensation/reward system, but how to use the site. At least on the other two apps, one can focus upon that since the apps are relatively straightforward compared to the traditional ones.
And I use middle class as an economic term.....
And those in the lower classes, on STEEM at least, wont be there for long if we are successful in what we are doing.
Great! So there's more to come, too! ;) LOL
I think this is what's going to hold Steemit back, and possibly STEEM too (depends on the apps built on top). It has to be ultra-simple to explain and understand. The more friction, the more people give up. Look at Twitter - even that's seen as too complicated for many people.