Hmmmmm... I don't think it can work as a true Hivemind, but at the same time it could serve to get focalized information.

In the short term the hivemind project you posted has some merits to leverage social data and separating responsabilities. Steemit is built around communities nowadays due to the $ separation between users. Most new users join several communities in order to get attention from some people and get their big $ votes.

NOW, the thing is that ideally in 8 or 10 years from now on, steemit will be a lot different and whales may be scarcer and the greatest amount of users should be around orcas and dolphins. At such a point people will start to act as individuals instead of going around communities (that's my opinion anyways)

At the same time, social studies have proven that humans will always succumb to social pressure of some kind, so people will still band together in communities related to some kind of interests. The issue is that people will usually form part of several communities...

And now that I'm thinking... what if communities join together in one mega community, what if we're slowly working together to one major objective in an unconscious manner?, would the Hivemind project help figure that? Maybe I'm just reading too much SCI-FI