Midoryu: Update, I received a reply via Mail by
Beautiful Glitch:
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Hi! We're discussing it with GOG to see if we can sell them there. It's still too soon to be sure. Best regards, J. Quijano -------------------------------
personthingy: They've never had a delay releasing anything extra on GOG, why now all of a sudden? Sounds suspicious, though I really hope I'm wrong.
Honestly, it kind of seems like a stunt to boost sales on Steam, which is sadly a thing many smaller devs do...
The more people buy on Steam on release day = the more likely their game will trend and be seen by more people on the front page. Easiest way to get people to buy there is to stunt the other platform releases with missing content, so people will want to buy the more "complete" version (Steam). After all, any sale on competing platforms means less boost to the Steam sale, therefore it's lost publicity...
Sadly, this is something I've seen happen a few too many times when I ask smaller devs/publishers about why no concurrent release on GOG. Of course they never outright admit to it (usually there is some handwaving about GOG being slow, or that they're focusing on just one store first), but I've seen a few of them mention in conversations with other people about how important getting their game to trend on Steam is by using the above tactic. So idk.
I hope that this is just an oversight on Beautiful Glitch's part, and not something so insidious. I really do. :(
As you said the truth is that they aren't at all interested in the GOG version of their game. Apparently they didn't offer their backers the chance to claim a copy on GOG, and on Discord, in addition to constantly writing to leave a review on Steam, they said that they might not be able to offer the DLCs "on time" even though their time limit is completely arbitrary and decided by them.