Ancient-Red-Dragon: The list in the OP is awfully incomplete given that it again completely neglects the legions of GOG games that are missing Achievements on GOG, but yet on Steam, those very same games do have Achievements.
The list in the OP is thus privileging some ways of treating GOG customers as second class citizens as important and worth shaming the pub/devs about, while simultaneously, implicitly sending the message that treating GOG customers as second class citizens in other ways is perfectly fine, and no one should even notice those forms of unequal treatment, much less call the devs out for them.
Therefore, until this list in the original posts is changed to be inclusive of all games that should be on it, and of all ways that pubs/devs on GOG treat GOG customers like second class citizens, then I must must conclude that this list itself will continue to be treating some GOG customers like second class citizens.
Sir, you could've just said "It would be nice if there was a section listing games which have achievements on Steam, but not on GOG, since that fits in with the theme of the thread", instead of ... that.