Hidden content will still be available on the blockchain and possibly other UIs, but they will be filtered out by Hivemind for the data that is presented on Steemit.com.

From what I'm reading... Hivemind is specific to Steemit.com and will be licensed out to other providers if a suitable financial agreement is reached.

...it sounds like Steemit isn't going to make communities available on the blockchain itself, and will own the rights to Hivemind.

I understand that Steemit wants to bring extra value to its own website, but what is ironic about this, if you implement "communties" that only exist on one particular website, you end up disrupting the community who uses steem on a whole across multiple platforms.

Obviously each website can implement their own "hivemind" compatible system as well, but that would involve them having to develop it themselves just to compete with Steemit.

Do you know about this privatization of Steemit's Hivemind? Or am I the first person to make you aware that it sounds like it will be a steemit.com only feature?

The reason why I think this is based on the quote I've taken from what you've written above.

If communities were open source, and not specific to steemit, all it would require is a hardfork of the steem chain.