Idk guys.
I have chatted with him and he seems cool.
I think who he preaches to, his advice is quite apt.
For someone who struggles with social interactions, isn't super extroverted, performs okay at work but isnt as confident, always faces an imposter syndrome within self. Most such people are terrified of interviews and swallow their low pay to avoid confrontation.
For that cohort, whatever he says, makes complete sense. It's exposure therapy. Keep interviewing so that you are comfortable, you get good at it, have the confidence to go and ask for the raise.
His incessant posts on twitter is also something similar. He forces a post every day to feel comfortable posting.