[AlchemistCamp]

Yes, and I'd say his following was earned and his methods can be copied... they're just a lot of work and take time.

The quality of his work has definitely been a key factor, too.

[nkrisc]

The age-old magical formula of: high quality content + good marketing + loads of effort = success.

Seems as though he's put it lots of effort over the years creating valuable content (and giving much of it away for free) and marketing it widely and effectively, and he's being rewarded for that.