Tormentfan: Yes, you most certainly can blame them.. What about their customers who DID buy it here, that's a massive F.U
It should be in GOG's contract that they MUST get access to sell DLC if they agree to sell the game in the first place, GOG have an obligation to their customers to give them completed products when they become available if they sell the main game.. why does this need explaining?
Avogadro6: I said "if they haven't sold much"; for any other reason I'd agree with you. A lot of indie games sell a ridicolously small amount of units on Gog, and if that means releasing and supporting multiple version is not financially realistic for the devs (which may or may not be the case here, I don't know, and it seems no one does either) then I'm sorry, I don't expect them to do so.
As a side note, contracts are an agreement between multiple parties. Which means that Gog has its fair share of responsibility when its consumers are treated like second class citizens, and yet, somehow, everyone is knee-jerking only against the devs... but that's neither new or surprising, I suppose.
If supporting two versions is not financially viable, then why bother coming here in the first place. they are a business and should learn to start acting like one, just because it is a digital game doesn't mean they can get away with whatever they like, well outside of the steam environment anyway.
As for maintaining separate versions, if they didn't impose steam software into their product in the first place there wouldn't need to be two versions, that is where the real problem lies.
I do agree with you though, focus should not be solely on the dev, GOG has to take a big share as well. This is damaging for them in a business sense. In an ideal world the should just pull the game from sale, however I doubt they have the clout for that type of action and may feel they would lose further games.
As.for me, I have very little impetus to support devs production of green light or steam only releases so I have dropped from my list.