erephine: Yes, it's likely that the alternative would be to remove the original games from sale on GOG entirely and you can argue whether it is better to sell the originals as bonus goodies as they are doing vs. not selling them at all. But no one put a gun to their head and forced them to feature or market these 'editions'.

superstande: I don't want to defend neither GOG or the remake publishers. Never going to get the remakes, since I've already have the better old versions. But GOG could've been, though I'm not saying it was like this since I don't have the facts, but could've been facing the removal of the old classic games as the only alternative to letting the remakes sort of taking over. Personally I'd say it may be better like this: at least these classic adventure games remain drm-free here, though the money may from now on go to people one would not like to see receiving the rewards.
Funny thing, I read someone on twitch who had been interested in the games, but was seeing all these negative reviews - which I'd wager were about the remakes mostly... So the negative press may even make people skip the chance of getting these classics mistaking them for shovelware...