Gudadantza: One thing I can't understand is why some of the most angry and aggressive users in this topic are those without a valid GOG profile
As others pointed out, my profile is disabled. I don't want any of that crap. I don't track achievements (I find them rather harmful to game play) and certainly don't want to share such... which would also include timestamp earned, which is quite leaky of data. I play games on my lunch break, a supervisor could misinterpret that as playing during the working day. I absolutely don't track time played. As others addressed, there's no tracking it from years past, etc; not that I would. I don't need it. There's absolutely no value in tracking "I have played this game 300 hours". In fact, it's of anti-value and can lead to self shame for some people. And, yes, it's true that some people may be able to use that information for practicing self control; for them, there are whole-life time tracking and scheduling applications that would be of better utility.
And so on.
Also to the person asking for GOG to say "profile turned off" rather than 404 [EDIT: learned that's you, too]: that's a security feature. If someone doesn't post in the forums or reviews and disables their profile, it SHOULD give error and not report disabled. Reporting disabled leaks information: "this user name is taken, active, in use, and by someone who disabled their profile". This is similar to web sites that should always report "bad user name/password combination" rather than "this password does not match the user name" [which leaks "you guessed an accurate user name!"]. Similarly, additional factors should always come after matching username+password. Sites that accept a user name and move on to an alternate security question (favorite restaurant, or some non-password security check) before checking password are leaking that same information, allowing for easier guessing of credentials over time (unless, of course, it ALWAYS goes to a secondary security check even on an invalid user name -- but that usually requires them populating the often-self-selected lesser question, which can lead to building a list of those questions to know validity.