Leroux: I heard that, too, but what about Deponia then?
SirPrimalform: I didn't know that was considered an episodic game, I thought it was a series in the old fashioned sense?
I haven't played it myself yet, but I think I've seen it mentioned as episodic, maybe even by Daedalic themselves, but I might be mistaken. In any case from what I've read, the main story is not concluded with the first game and it was planned as a trilogy, and the second game was released in the same year as the first. But then again, maybe be it's just as episodic as the Blackwell series where each game also tells a self-contained story, dunno. And e.g. Syberia isn't considered episodic either, although the story is cut in half.
Who knows, could be GOG's reason for not taking episodic games is that they want to make sure the series will eventually get a conclusion, and that they trust an established company like Daedalic more with that than some indie newcomers.