Two reasons:
1. Guilt. (I feel education should have a different model to business)
2. Some great advice given by Seth Godin in Linchpin: Are You Indispensable? How to Drive Your Career and Create a Remarkable Future.
Q. Does this mean that you're making #uppingyourgame: an educator's guide to productivity free as well?
A. No. I'm iterating a new publishing model with #uppingyourgame. It's different and more widely-applicable. 
