I recently downloaded a book from a link I found on permies. After not becoming a contributing member of the library I received this letter http://soilandhealth.org/nojoin.htm .
I have to say it reminded me of "The Empire" and truthfully made me feel like a bum for not giving the 10 bucks. My thought was, some variation of the "thanks for not cotributing" letter would be nice for Paul's podcast. I have no ideal what it would take to implement. Just thought it might be nice to sort of kick the non contributors in the ass before they listen for free.