Then you should only allow S9s to mine to your pool because I can't find the source code for S11, T11, S15, all of the 17 and 19 series, if publishing a single version gives them the permission to not publish the rest, all these custom firmware devs can just publish one version for a given miner and keep the rest.

Give up Kano, Bitmain gears with the stock firmware do violate the GPLv3 license in the same manner that all of these custom devs do and yet you are fine with allowing them to use your pool, it's just easier to deny that than having to admit that you are cherry-picking who to "fight".