I am surprised that Jardini found Justin Dupre to be arrogant. I have known the guy for a year, and I've met him in person in Bangkok. We didn't talk business at all, just chilled out, he was very friendly and helpful in terms of Bangkok. I think he comes off as a bit of a quiet type of guy, which probably can be mistaken for arrogance.
I've occasionally given Justin a bit of a ribbing about his choice to be what I call a "pro-blogger" like Shoemoney & John Chow, and the other bloggers we like to make fun of.
But ultimately, pro-bloggers get more known, get more access, get more information, and get more streams of revenue. There's a huge upside to being a pro-blogger if you're willing to put in the work consistently, every day for years. Justin's definitely doing that, and he is going to go far.