That was short lived.

That is the first disclaimer I've seen on a store page that is longer than the game description.

Developer made the comment on the Steam forum : "Going onto GOG I expected maybe something like 10% of Steam, but it's more like 1%. Same with releasing a Linux version. It's all worth so little for us that it's rather annoying to have to do the extra work all the time and carry that weight around. I wouldn't do it again."
https://steamcommunity.com/app/813630/discussions/0/2252308752476410536/#c2282708683255940081

So it's also highly unlikely that Supraland 2 will see a GOG release.

And now it will be 0 %.

What did the dev expect when releasing it on GoG 3 months after the initial release on the other platform?
It's evident that most people simply cannot muster up that amount of patience these days.

Maybe would've looked different if Supraland had been released concurrently on both platforms.

Quite a smart decision from the dev, indeed. :|
Refusing to sell on multiple platforms (and thus getting more profit on the long run) and instead focusing on a single gaming platform for quick bucks.

I honestly don't know what's happening to the world right now. It seems that everything (from politics, to culture, to social status, to videogames, etc) everything is rapidly going full retard.

EDIT: I was interested in buying the game, but I was waiting because the price was too steep. Now that the game's delisting I was considering buying it before it vanishes.
But then I thought: "nah... I'm not gonna support greedy devs. I'll give my money to someone who deserves it, instead."
Besides, I wonder... All these indie publishers who've been selling on GOG for 5 or more years must surely be having a lot of effort and suffering for selling here, considering that their games are still on the store for so long.

It's even more incredulous that the dev is pulling a game whose state has been done for a while. Why pull it now when he doesn't even need to put any more work into it? Does not compute.

Surprising to read this:

"Going onto GOG I expected maybe something like 10% of Steam, but it's more like 1%. Same with releasing a Linux version. It's all worth so little for us that it's rather annoying to have to do the extra work all the time and carry that weight around. I wouldn't do it again."

from a fellow citizen. In Germany thrift is still considered to be a virtue.

Wer den Pfennig nicht ehrt, ist des Talers nicht wert. (A penny saved is a penny earned.)

1% is still more than 0%.

Lieber den Spatz in der Hand als die Taube auf dem Dach. (A bird in the hand is worth two in the bush.)

I am not sure what happened to DavidM since the Unreal Tournament days but this attitude reveals that he sees GOG customers as third class citizens (-> "annoying", "I wouldn't do it again"). This unprofessional behavior has one consequence. I don't support this developer. He can release his games on itch.io, EPIC or whatever. I don't care. I won't buy it. And I frankly don't care whether Steam games can be DRM free or not. And if EPIC decides to do a Supraland or another game from this developer giveaway I won't claim it.

It also shows a problem CD Projekt and GOG have. The lack of advertisement. I've just read a case where someone bought The Witcher 3 on Steam because he didn't know that GOG is part of CD Projekt (YES!). He would have preferred to buy it here on GOG because he could have supported CD Projekt. But it was too late.

GOG's main problem is that people associate PC gaming with Steam. There are many trailers, news, etc. on different gaming sites that only mention Steam although a GOG version of a game exists. They usually post links to the Steam store. I know some people who prefer buying DRM-free games, but they end up buying the Steam versions because they don't know that a GOG version exists. And this is most likely also the problem with the GOG version of Supraland.

They're working on DLC

All of the issues regarding support or whatever would have been dealt with if it was one build for all services. The same build that works on steam working on gog basically. That would reduce whatever costs he's complaining about greatly. But no, he just solves the problem by getting rid of gog.

Oh well. Can't say I'll miss the game. He can go back to Valve - not to worry. We're covered by other releases from other developers, with 2020 looking out to be a great year for GOG, update blue dots and Deus Ex shenanigans aside.

Personally I think all that you wrote is 100% correct.

As for the issue of GOG having less publicity and coverage than steam, without trying to enter into any "conspiracy theories", I guess it's safe to say that a heavy part of the videogame industry (mostly the AAA type) has no interest whatsoever in people knowing that there's a DRM-free market for videogames. It's more and more evident, as AAA publishers seem keen to enforce stricter DRM on its products.

The gaming press is also (on my opinion) one of the greatest culprits on this matter, since for many years they always helped to enforce the definition that "steam = pc gaming".
I still remember well how it wasn't until 2013 or 2014 that Rock, Paper, Shotgun began to acknowledge the existence of GOG. Because, for all the previous years, whenever a game was launched (on both stores) they'd only mention the steam release as if no other stores existed. Until increasing pressure from the readers forced them to finally mention the GOG store for such events.

I am glad that it will be delisted. At least the guy was as honest to remove the game now that he decided to not update it anymore instead of keeping on selling it here knowing that he won't update it anymore.

They're still quite bad at it. Half the time forgetting about GOG whether it may be something newsworthy like game giveaway, new game releases (on anything other but Steam), or their best-of lists on which quite a few games with GOG equivalents are not mentioned at all..