Excellent points. One that especially resonates is “Exists away from the noise, clutter, and cyber warfare being waged on groups.” Facebook is (for most people) a relatively-unpleasant experience today. Spending time elsewhere is much more pleasant … and why wouldn’t you want your customers to have a pleasant experience interacting with you!

I added a link to this in my discussion of Facebook alternatives in A Potential Tipping Point, where I already had a discussion of Mighty Networks.