Orryyrro: Yes, they have to uphold all of them, which they currently aren't.
Also, it was a hypothetical situation, it is DRM because it
restricts a legal
right through
digital means, in this case by tying them to an account.
Does Canadian law really prevent people from signing away their rights? In the US there are certain rights which one cannot sign away. Whether they like it or not they cannot sign a contract to be a slave. But one can sign away the right to sue if one chooses to do so.
Just because something is a right doesn't necessarily mean that one shouldn't be allowed to sign it away if one so chooses.
Darling_Jimmy: For one thing GOG wouldn't be advertising on piracy websites if at all opposed to piracy. So it is quite absurd for GOG to specifically forbid lawful actions. The fact is that there is no need for terms and conditions because—as you just said—every country already has it's own copyright act (the ultimate EULA.) And again, it sounds a lot like you are justifying assumed guilt. It is strange to me but the USers here seem to understand that it's okay to treat the innocent like criminals so maybe it's one of those cultural differences.
If you're referring to Abandonware sites, that's the norm. How else are the sites going to indicate where one can lawfully purchase the files?
Otherwise, it's likely that whomever it is that's handling the ad space hasn't told them precisely which sites they'd be advertised on.