What's funny about this list is how much of it amounts to a few companies -- ThinkPenguin, Libiquity, and Technoethical -- rebranding commodity hardware like Atheros wireless cards. There's nothing unique about this hardware which makes it more "free" than any other off-the-shelf Atheros cards, and the drivers were open-source long before any of these companies got involved.
It has been fairly well established that in practice, some of the companies selling with RYF certification are basically scammers. Lots of people have been charged without orders being shipped. Google around the company names for the horror stories.
