For the record, I think it's safe for me to come out and say this:

We do use the wishlist but it's not the only thing we use when we decide whether a game should be on here. If we only used the wishlist, you'd never see some great series such as Geneforge.

Heck, I personally use it myself as seen and [url=http://www.gog.com/wishlist/games/savant_ascent]here.

tl;dr: we use it but it's one of the many tools at our disposal :)

I can't speak for those companies hence the reason I was clarifying the statement made by solzariv :)