I've heard Rob Walling recommend this approach on his podcast, and noticed you do it for AR, but I've never seen you write about it. I would love to hear just a little more about it and any A/B data you've collected on it.
On the one hand it obviously decreases the number of users passing through the sign up stage of the funnel, but on the other hand it's obvious that the customers who do sign up convert a lot more.
Thanks!
By the by, I also think that a lot of what you suggest for direct response marketing also has branding effects - just think about educating people by email for free - so the two things aren't necessarily in contrast. And I don't think that there would be much to debate about the value of your personal brand here (meaning no offence - if you don't like the word brand, just substitute "reputation" to it!).
Feel free to ask questions if you have them.