Implying his approach is not viable is weird, given that what he's doing is demonstrably working (at least at the moment). He's making free software and then selling subscriptions to training content, which is where he seems to be making something like 80% of his revenue. It's like Railscast, Laracast, Egghead.io (originally just angular tutorials!) etc.
The main difference to railscast, egghead.io etc. is that he's using Github as a payment processor & to manage subscriptions.
Implying his approach is not viable is weird, given that what he's doing is demonstrably working (at least at the moment). He's making free software and then selling subscriptions to training content, which is where he seems to be making something like 80% of his revenue. It's like Railscast, Laracast, Egghead.io (originally just angular tutorials!) etc.
The main difference to railscast, egghead.io etc. is that he's using Github as a payment processor & to manage subscriptions.