GRSecurity Linux Kernel patch to end public accessability of stable patches.

Here is the claim from the project as to why they are closing access to their derivative work of the linux kernel:

"Important Notice Regarding Public Availability of Stable Patches
Due to continued violations by several companies in the embedded industry of grsecurity®'s trademark and registered copyrights, effective September 9th 2015 stable patches of grsecurity will be permanently unavailable to the general public. For more information, read the full announcement."

http://grsecurity.net/
More: http://grsecurity.net/announce.php

Note: No claim of veracity of their claims is made by this submitter.