GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.
On 2016-11-20, the number of direct users dropped from about 8000 to about 5500. There was a simultaneous increase in bridge users (mostly obfs4) from about 500 to over 1200.
One month later, on 2016-12-22, the number of bridge users dropped again, almost back to where it was before.