"Microsoft's Sam Ramji has stated that Microsoft's decision to
release the Hyper-V LinuxIC drivers under a GPLv2 licence was "not
based on any perceived obligations tied to the GPLv2". Ramji says
that instead it was because Microsoft determined that it was
"beneficial" to them release under the GPLv2 because it was "the
preferred license required by the Linux community for their broad
acceptance and engagement"."