im invested in all 4 but howdoo is topdog, especially in light of the facebook scandal and the way fb conducted themselves at the EU's questions. howdoo is something all who use socialmedia alot need.
It seems to me that it is best to use the information that is on bitcointalk, because most of the forum participants correct the information more or less. And Social networks can be used not only by professionals in the world of crypto currency, but also by scammers.