C2 had lots of things added over it's life time, that were still in need of refinement, but never got it - pay a sub for half-baked additions?
Chrome is always adding little bugs here and there that eventually may get fixed but definitely not when you need it to be fixed - pay a sub to rely on Chrome?
Most hobbyists hate to rent tools - subs a good idea?
The way C3 is being marketed - nothing jumping out as a must have yet. From the current blogs I get the feeling that C3 is just C2 ported to a browser with a few teaks that should have been added to C2 anyway.
So not wowed at all - I thinks it would be better to just tell us everything there is to know about this new tool, instead of playing this weird slow leak game.
But anyway best of luck to Scirra.