In October 2015, Red Hat acquired Ansible, the developer of the famous configuration management software Ansible, apparently for a price of about $100M.
Ansible, the software, AFAIK is licensed fully under the GPL. Ansible, the company, does however also develop an extension to the software called Tower that, as I understand it, is basically just a web GUI to the core software.
Considering that Redhat could use Ansible for free anyway, and would, I guess, be very well capable of creating their own sort of GUI if that's what they needed, and that even if they bought the company they still have to adhere to the GPL for the core, why on earth would they spend such a huge amount of money on this acquisition?