You're reading way too far into this. There are no plans whatsoever to close-source or charge for the project (other than the paid hosting plans currently offered). That's plastered all over the kickstarter[0] as well as the website[1].
Not to go against what you're claiming, but to play devils advocate for a moment if you take a look at Invision Power Board[0] (now called IP.Board), they were once a free and open source bulletin board / forum system. In fact, their slogan was:
Apache, PHP and mySQL are all free, why should you pay for a bulletin board?[1]
They've since completely reversed their stance on that and now require payment for IP.Board. I'm sure there are other examples of this happening too, that's just the one that I remember most clearly when it comes to companies taking once free software and then charging for it.
aah!! coincidentally i do own a license of IPB. I never knew it was free. I love IPB as a paid BB. My sole point was, If one's product is not 'commercial' then they shouldn't advertise it in a commercial fashion either. Because I can see, a lot IPB Free users would be pissed off, when they had made the switch.
[0] http://www.kickstarter.com/projects/johnonolan/ghost-just-a-...
[1] https://ghost.org/about/