diversity

You know, the more I think about this, the more I see benefits. If we take our WikiProject Quilting example above, when they do outreach, they're coming into contact with fellow quilters, making a connection, and when that non-Wikipedian creates their account, they'll get a Welcome! message from someone they already know, which will dramatically cut their bounce rate. Further, they'll make their first contribution by editing a subject they love, in an environment with helpful people who are like them (fellow quilters) to answer their questions and help out. And as they'll be joining WikiProject Quilting as soon as they become editors, they'll belong to something, which will help increase their feelings of belonging to Wikipedia as a whole.