TheEnigmaticT: You are correct. But we don't get paid for running those ads. It costs us money to run them. I'm not sure how that qualifies as making money from piracy. Those banner ads attract people to GOG.com who frequent abandonware sites, however, and convert them from pirates into legal buyers.
Darling_Jimmy: I'm not interested in the ethical component of the discussion. I just can't believe that your partners don't care about GOG funding websites that freely distribute pre-cracked infringing copies of their games but they do care about someone asking how to crack a legally purchased game for personal use.
GOG's partners probably couldn't care less about either, but on one hand we have GOG using ads to bring pirates to legal game buying and on the other we have users linking to crack sites to make it easier to remove DRM on products - and that might potentially lead to the biggest of no-no's: removing the DRM on a new game! Gasp!
True, a license holder might object to an abandonware site's activities and if they cared, they would - i.e. if they cared about the activity of abandonware sites, they would've shut them down already. Ergo, they don't really care about abandonware sites or their old games all that much. They are much more likely to care about their precious new games and DRM however.
So for GOG using advertising on abandonware we have: 1) publishers don't care about the abandonware site's activities vis-a-vis old games, 2) publishers do like the idea of turning pirates into legal buyers. Only a win. For GOGers linking to crack sites we have: Noooo! Not our DRMed new game!!!!! Only a negative.