They employed one of the original Btrfs developers for the first half of its development, but not since 2012. I can't speak of their recruitment efforts, but it

They employed one of the original Btrfs developers for the first half of its development, but not since 2012. I can't speak of their recruitment efforts, but it does seem all the Btrfs developers are happy at their respective companies; and the Red Hat file systems folks are happy working on what they're working on which is not Btrfs.