And, of course, the link was broken in the worst way possible; instead of yielding a 404 error page, it just silently redirects to the list of games. Please, don't do this; it's obnoxious; return an error instead (or return a version of the gamecard that says the game is unavailable).
What bothers me about removed games no longer having a store page, is that for online digital games distribution, the store page of a game is practically synonymous with the physical game box, and when a game gets removed from a store it is essentially equivalent to taking the game box away from every single person who has ever bought the game in that store.
A game box contains some screen shots of the game, description of the game, system requirements and other information that is perpetually useful not only to people who have not yet bought the game, but to people who OWN the game and want to be able to see all of that information in the future as well.
But instead, a game gets removed and its store page vanishes and we can never again view the system requirements or other useful data that was present on the store page. Steam is the same on that front and personally I find it extremely irritating.
That's one thing that we still do not have in DRM-free gaming, is a digital "game box" that we permanently own that gives us the information only available on the non-permanent store pages. I wish GOG would be one of the first storefronts to DO something about this problem. Call it "GOG Boxes" or something, where you buy a game and you get a GOG digital box for it that is permanently owned on your online digital GOG account, visible both in the web browser and Galaxy, and maybe comes as a downloadable GOG "goodie" as well or something. I'm sure many gamers would appreciate such a feature, I know I would, and it would be totally unique to GOG because nobody else does it.