That article was very interesting.
Some of what I got out of it is that because they moved around a lot when young, he and his brother learned to depend on each other. So instead of reaching to new friends, new ideas, they help each other. That would certainly impact his view of things like 'improving' his game. Essentially, unless he or his brother think something needs improving, nothing needs improving. It also means that while he may enjoy his fanbase, he doesn't NEED his fanbase. I bet if everyone abandoned his game he and his brother would still be tinkering with it as always, because that's all they need.
It's a labor of love for him. This means, in my experience with other labor of love situations, that his reasons for doing anything related to the game are private and may not have any relation to typical concerns like making money.
In my view it's comparable to knowing someone who plays guitar amazingly well. So well that everyone he knows keeps telling him he should play professionally because he could make a lot of money. But the guy only plays because he likes to play, and that's all he'll ever do is play for enjoyment. All the people constantly trying to make business introductions for him or get him paying gigs are just background noise. They're wasting their breath.