MarkoH01: I would even go further: If I BUY three games since three games are adverized I expect to get three actual games - either in form of a redeemable key or in form of a giftable key. I don't expect to have to deal with ANY kind of expiry date AT ALL - especially since none is listed on the product page. If GOG simply cannot handle such offers I'd suggest to not do such things at all (or at least I'd suggest them to talk with their legal department before doing such things). Sorry - but this settles it for me. While it still would be a great offer to get just Kingdom Come alone for this price I just won't buy because I simply cannot support such business practices with a clean concsience. I know GOG did not have any bad intention but this is hardly legal and they should have thought about this earlier.
krakataul: You are not buying 3 games, you are buying right to add 3 games to your GOG library and since you already own some of the games, then you get this bonus from GOG - possibility to gift extra codes for limited time, as noted on 3 game-packet page. As you said, Kingdom Come alone is worth the asked price, so for most it is still an OK offer.
The idea that you're purchasing the right to add something to your library rather than purchasing a game is lamentable to begin with, since that goes against what gog says it's all about. We're supposed to "own" the things we purchase. That's their words, not mine, which appear to have been for marketing purposes only.
I was disappointed to see that they weren't adjusting the bundles for games owned, but that was forgivable. Having the "bonus" code expire is not. It's not a bonus, it is a good I purchased. This is just terrible business practice, and goes against the only reason I purchase games from this company. I purchase things here to own them, not to rent them. The stance on these "bonus" codes, plus the change from labelling owned games as "owned" to "in library" concerns me.