Stefan Molyneux is a YouTube legend, a guy who sounds educated and philosophical, but who recently has had hit pieces done on him by notable YouTube atheist Thunderf00t and Zeitgeist founder Peter Joseph (this last about a year ago).
Additionally, I've heard that he has founded a cult.
The Young Turks got mad at him recently because he challenged Ana Kasparian.
So, there has been a bit of controversy, but I'm not entirely sure if he just attracts a lot of criticism for his non-PC views on society, or because he genuinely is intellectually dishonest/ a would-be cult leader.
I lean towards thinking that he is just a harmless crackpot convinced of the holy power of the market.