You are right about CGminer License. But you are wrong about what we do. It is not our own Firmware.
Actually, we don't have our Firmware so we don't own the source code to share, It is part of our partnership program, all users are free to decide if they want to use Vnish Firmware or not. It is why we called the firmware Vnish-Mineitor. So users will know this is the same firmware with Vnish.
Many users don't care If custom firmware developers share the source code or not. Vnish is respected in the community among many users. so we respected and cooperated with them.
With your logic many miner manufacturers is violating CGminer License which also is connecting to your pool. so you are the supporter of them?