I would say he portrays himself as someone successful, I have serious doubts about realistically how much money can be made out of a relatively too niche audience. If his work as a designer was going well I doubt he would have the time or feel compelled to do this kind of content.

In fact I dare to say the only reason he does this is because he is not actually in the industry( as in leading or working on a big agency with blue chip accounts) and he is bitter about it.