adaliabooks: Hmm... I'm not sure. I think BE did some stuff to hide them but I think someone else made a separate script that did it.
Hyper will probably know (or have it) as I seem to remember him being one of the people who used it.
Small correction - IIRC, it was mrkgnao who had made a thread asking for a userstyle to hide everything GOG Galaxy related in the library, someone linked to one they made, someone else linked to a userscript they made, but I have no idea if any of those links still work.
I never used any of the two, as I made a couple of rules in Adblock Plus when the NAS was rolled out to hide all that.
Nice to see that Wurzelkraft saved the day, +1.
On a side note, is anyone else suddenly seeing everything in bold font in the drop down menu when hovering over a user's name, or is it just me?