I give him full marks for consistency. Having said that and knowing what we have seen for so long, maybe we should be looking to the action where he stops selling. That's more likely a better signal for one to follow.
http://www.investopedia.com/articles...
So if he was dumping all procedes from insider sales back into the company, he becomes one heck of a financier then doesn't he?
I think a closer look at the books would explain how the company raises finances for day to day operations or what have you. If he was this heavy inot things there would be all kinds of paperwork showing him as someone the company actually is in debt to.
What's the burn rate by the way? Does he sell stock equally in all companies he holds? Lots of things to look at.