I think Michael has an excellent point. The nesting of the Palatine Migration Project inside the German Root project is cumbersome and creates confusion. Indeed, the tag "German Roots" is too general to be useful for most Americans with German ancestry--and you have to get through that to join Palatine Migration. Some (not me) have advocated that Irish and English should sometimes be classified as Palatines, which would make even less sense if inside German Roots.
I have carried the Palatine_Migration tag on my profile for over a year, and at least twice since then, I have been encouraged to joint the project. To paraphrase Mark Twain, I would not join a club of which I am already a member.