JakobFel: Also, using the privacy argument is an invalid comparison. Literally NO harm can come from you using Galaxy or at least hopping onto it just to claim the rewards, whereas a lack of privacy can cause a whole plethora of issues these days.
If I recall correctly, when GOG introduced user profiles for everyone (here on the website) which are connected to Galaxy, the profiles were not only public by default but included the option to search a user by their email address. If the user was playing on Galaxy, and racking up all these stats for their profile, and used the same email for GOG as they did elsewhere for personal/work, someone could easily search them and find this information. It is not difficult to think up hypothetical situations of how this could be harmful; perhaps someone was gaming when they should have been working, perhaps someone is now facing an angry partner wondering why they spent so much time on GOG when they should have been doing x,y,z. When you say "literally NO harm" can come from Galaxy and the way it is designed to share everything, you are quite mistaken and should immediately retract such a statement for its blatant falsehood now that you have been called on it. And all of the problems of situations I just explained is even BEFORE we reach any privacy concerns on GOG's side of things (other than their opting people in automatically to the profiles).
Additionally, using Galaxy, yes, even just hopping onto it to claim the rewards, is a different type of data GOG can use aside from privacy concerns. By using Galaxy, GOG/shareholders can now justify counting you as a "Galaxy user" in making decisions going forward and in taking further steps towards the issues we are justifiably complaining about in these topics. In other words they can say, "the offline installer users are just a very very small minority and even many of those who use offline installers also are willing to use Galaxy." Whether they are accurate in assessing customers' desires is besides the point; think of it like a lawyer making an argument, twisting any possible fact into a way that favors their case. Better yet, think of voting (if this analogy is allowed, otherwise mods can delete this portion of my post). Even when people have the option of write-in votes, and write in their own name, "no one" or, "yo mama", the political class can still spin the raw numbers as people participating in the process and use it to justify the system they are pushing on everyone.
Don't think for a second that GOG/shareholders won't use any excuse possible to funnel more people to Galaxy. In fact, the Galaxy links everywhere and the hiding away of offline installers proves that. If when it originated (or should I say Origin-inated), Galaxy was so great and so desired, it should have been left to stand on its own without all this artificial "help" to its visibility.