WinterSnowfall: Thanks for the heads-up, but mind you this thread should also be stickied.
No, it absolutely should
not. All that would accomplish would be to render it invisible to the vast majority of GOG's forum readers, and therefore make the announcement post totally useless, as no one would ever see it until after they de-Sticky it and thus make it visible, at the time when the game is no longer available to purchase on GOG.
This is the first delisting announcement that I've seen for years prior to the delisting event itself having occurred, and the
only reason I've seen it is because it
isn't currently Stickied.
And the other ones I never saw while the games were still on sale, I never saw them
only because they
were Stickied.
Before GOG ever started the terrible policy to "Sticky" delisting announcements, I saw most of those delisting announcements while the games were still available to buy.
No doubt in regards to the things I just described, the same will also be true for many/most other GOG forum readers as well.