undeadcow: Sunless Sea looks epic and I'm considering a Humble Store purchase to lock in early adopter bonus. I'd really love to see GOG put Sunless Sea up for "preorder" with an "all future DLC" bonus matching other storefronts.
I saw the early access bonus listed in one of the top posts (all future DLC / expansions I think?) and if the price were right I'd certainly jump on this if GoG could work something out for a preorder.
I'm sure a ton of people would flip out though and such things are a narrow line to walk. However I think in this case (for me at least) it'd be worth it as I like the look of the game!