The explanation is not weird: If one is running a pool then one must allow the OEM firmware because that is what the vast majority of miners use.
There is no evidence that suggests that the above is correct, for all we know, it could be more miners use custom firmware than not, we don't know, despite the fact that if I had to guess I'd guess that most use the OEM firmware, but that is irrelevant, just because the majority of miners use firmware that violate the license it does not make them better than the minority that uses a different firmware.
With that in mind, what if it was the other way around? imagine 90% of miners run custom firmware, based on your theory it would be okay to allow them to mine to the pool and block the stock firmware instead?
It is tilting at windmills to do otherwise.
It's funny because kano said:
Yes the world is full of "I don't care as long as I get money" but I prefer to point out what is best to do, not what is mediocre.
So, the theory is:
Stock firmware violate: we can't do shit about it, most people use it, fighting that is stupid, let's pretend it's okay for them to do that and move on.
Custom firmware: it's just a bunch of small devs, not so many people use it, let's sacrifice those as long as they remain a minority.
Honestly, I don't think what he is doing is necessarily a bad thing, but almost most of his posts are "defending the GPLv3 license", you would expect from someone who does that to actually fight against all parties that don't distribute the source code and that includes Bitmain and the other major manufacturers, if he won't do that, he should at least not bug every thread with these comments about the license which he himself isn't honoring by allowing the stock firmware to use his pool.