I'm actually going to bump this because a friend of mine has pointed out something interesting.
Of the 3000 accounts that have signed the petition only around 1 third of them have signed up to these forums... So either not everyone is as interested as first thought, They have forgotten they signed OR people have been creating alt's to sign the petition.
There's nothing interesting about that at all. It's to be expected. You only ever get a small minority of players in any game go to forums to discuss it. In the case of a game that doesn't yet exist (like Ember), you'd expect this to be even smaller. So those comparative numbers are actually pretty good. Far better than I would have expected.
Most people will simply sign the petition and continue doing whatever it is they do. When there is something more concrete, you might see more of them.