Stooner: You just confused me even more... oO
and I think you meant "Journey to the center of the Earth" not the longest... ;p
QC: Probably. Oh well. I bought the bundle largely as a gift for my brother and his girlfriend. And I took the GOG keys.
You probably mean the Groupees bundle, not the Humble Store? I don't think the Humble store is selling these games nor have I ever heard of them giving out GOG keys. Humble Store is DRM-free installers for direct download and often Steam keys as a bonus. There have been a few cases though where developers gave out GOG keys to their first direct customers as soon as their game was released on GOG, too. One of them was the dev of Defender's Quest who's using the Humble Store widget on his homepage. But I don't think there's ever been an official offer like that, it was all just due to goodwill and great customer service.