Also, Michael DeHaan stepped down and left the company early 2015.
So this could explain why his very active github activities suddenly stopped early 2015, I just presumed it was due to consciously allocating more time for management and leadership.
His github contributions rate and depth for ansible while still the CEO in y2014 has been a great inspiration for me.
FYI- A lot of Ansible employees have a Red Hat past. The lead developer James Cammarata has, and is also the current Cobbler maintainer.
This is actually my first stint at Red Hat - as the Cobbler maintainer I just kickstarted RHEL (and some VMware) boxes a lot for my day job.