There are mainly two kinds of people on Steemit; the investors and the content creators. Currently Steemit favours only investors. When I invite people to join Steemit, I always tell them that they might get no rewards if they do not have money to invest.

It's difficult for curators to check the common tags, let alone new tags that newbies may be interested in. So for Steemit Inc to decentralise their SP, I agree with you for them to support communities that create contents or organise Steemit campaigns not only development communities.

There should be an application form for these communities, because it's really difficult for a community to get the needed visibility on the network. Recently, I started a community to bring creatives to Steemit. I'm glad some users liked the idea of the community though, was wondering how existing Steemians may react. I would like you to check out the intro post of the community project here and let me know what you think.

I read some time ago that the amount of a coin in exchanges influences the price of the coin. I'll suggest they put at least 25% of their SP (after powering dow) in exchanges, it's just my opinion though. The price of Steem itself will definitely bring new members. In December last year, the influx of persons to the blockchain was really high due to the prices of SBD and Steem. If something like that happens often, Steemit will even need more servers.