I hope they do. I own over 60% of the catalog and I'm curious how much it cost me.
I'm also a bit curious but I don't know if it is wise to inform GOG's customers how much did they spend here - especially those who buy much, much more than play :-P
We will soon find out
Fair enough... though I'm probably one of the most extreme in that case. Given how much time I spend addicted to fanfiction or programming, I've played maybe a dozen games in the last two years and I think Terraria, Escape Goat, and Unepic are the only GOG ones of any note with Minecraft and OpenTTD eating the lion's share of the time and quick-to-beat Humble Bundle/Store games like Bastion, Costume Quest, and Ittle Dew eating the rest.
The main reason I've slowed down around 60% saturation is because I've reached the point where most of the remaining games are either more expensive than $5 when on sale, already owned on Humble (meaning I want an even deeper GOG discount before I rebuy), or the reviews agree that they're junk. (If you include the stuff I own via Humble, I actually have closer to 70% of GOG's catalog)