...Will non backers be able to buy the game soon, or it will be available only at later date? If I understood GOG representatives right, non backers will have to wait 2 more months in order to be able to buy the game on GOG. Is this correct?
I'd second this - it seems very odd for a DRM-free KS game not to be made publicly available on a key DRM-free games store, and a bit of a kick in the teeth for backers who supported on the premise of it being DRM-free.
