I don't think that'll be necessary, if I'm reading this quote right:
Why make Steam mandatory?We use Steam because it's the best digital delivery system we have at our disposal. When a better one will pop up, we'll use that. Our focus is on developing the game and not on developing all the logistics it would require to come up with an alternative. We *cannot* develop this game if we can't patch and I frankly think the way we're doing it now is vastly better than the way it used to be where it was a rare thing for people to actually get your patches. Now at least the large majority (i.e. everybody except those who refuse to connect) get the best version of the game.
All Kickstarter backers have the option to use a Steam or a GOG key, even if they have a box in their tier, they will still get that option. Steam currently has better services than GOG and D:OS will use those, hence it makes sense we offer a Steam version to our retail customers. Digitally, you can make the choice yourself.
If this is not sufficient, I'm afraid there's nothing else we can do, so in that case you are better off asking for a refund and we will give one. We want people to have fun, not feel like they're being taken advantage off.