Unfortunately, this has not been the first time this has occured. Absolver, Battletech, Cyberpunk 2077, X4, Dying Light and others listed here: https://www.gog.com/forum/general/drm_on_gog_list_of_singleplayer_games_with_drm/page1
All require some a form of DRM to unlock either cosmetics, multiplayer modes or extra content. As a person who uses GOG, it is a sad state of affairs that they would choose to have a wide catalog rather than sticking to their original promise of selling games without DRM.
I thought they had stopped using those due to their unreliability. I know in scientific studies, the results are conflicting with the general consensus being 78%-90% effective. And note this is just the empirical evidence and can differ widely in real life scenarios.