I had to start ignoring these GOG sales because — just like Steam — I’ve amassed a huge library of games I’ll probably never have time to play. And I’ve purchased too many games on sale only to see them on sale again for still less before I’ve even had a chance to play them.
Realistically, when am I going to find the time to play through Baldur’s Gate, Icewind Dale, and Neverwinter Nights (and their sequels)? Probably never, but that didn’t stop me from buying them anyway.
GOG is amazing though if you’re into classic PC gaming as well as new stuff.