Private projects can be added to Dev Profiles

Most of the code in the world is closed-source and written for someone who pays you for that. It cannot be uploaded to GitHub or even shown to the next employer to prove your skills (hence the much derided coding tests and whiteboarding interviews).
StackMuncher App (https://github.com/stackmuncher/stm_app) can run on the developer's machine and analyze that closed-source code locally without disclosing a single line of it. Only the analysis metrics are uploaded to the Developer's Profile. Now I can start signing up developers as active members.