Well, Inspector General Superior of Splitting Hairs.
It is open knowledge when Mark released his system into the public domain. At the time he was not selling anything. So you are going to have to look for some more hairs to split to be right on this one.
Whether Mark has become a vendor or not after that I do not know, maybe you could ask him since it seems to be an issue with you.
I do know that I, some friends and family and few other trading acquaintances made a decent sum of money using the system that he released and although that particular method has since ceased profitability I still use components of it in systems I trade today. I have expressed my gratitude to him and I would take it as opportunity to talk trading with him as it would no doubt spark creativity and increase my skillset.
BTW, I really don't get the whole challenging mindset. It kind of seems like a lot of people here on ET can't read someone's post and determine if there is value in it for them or not. When I see that mentality I pretty much conclude that the person lacks the ability to think critically and thinks they have found a shortcut for locating validity by challenging someone to show them a dick pic. If it is a big dick then the person concludes the guy is good at F@$king. It is not really logical. Anyone can have a profitable trade or a well funded trading account. Both of those do not imply someone being a profitable trader or having the ability to impart knowledge to others. Even a blind squirrel can find a nut sometimes.