Copyright is flawed, abandonware is just a gray zone created out of necessity. Gog is only cannibalizing the copyright outdated laws introduced by MAFIAA/disney.
And you could not be further from the truth that their games were not abandonware. In fact, many of active abandonware websites took massive amount of content down after gog purchases rights and repacked it with dosbox, % of sales of which are not going to actual ceators of the game. Just licence/copyright moguls. Sure, they have pivoted to be a platform for releasing new games too. But this "we care about history BS id ridiculous". In gelal grounds? Sure, but in absolute moral swamp. An absolute copyright scum, that is only a little bit better than patent trolls.
And i was in fact very active in this community and know first hand that dosbox team and the vogons are definitely NOT happy with gog. You release open souece gpl/gnu licence in good faith, and for the good of humanity in general. In good faith, that when someone directly profits from you they sponsor your team. Not in faith so some nitwits from poland just repack your software with already accessible software and sell it with an excuse "wE cARe aBOuT PRreSUrvATIon".
Archive.org cares, dosbox cares, you don't