The two possible cookies I know of are the Amazon links that you will find at the bottom of the interviews. I receive a slight commission from Amazon when you click on the links.
I also use Google Analytics to better understand my visitors -- what brought them here, did they spend much time on the page, etc. If these stats give me any true personal details about you, I don't know how to access them. But here's Google's policy on their analytics.
I will personally never sell any information that I can review to a third-party.
This website is to provide information for all. But please only quote in reasonable amounts and credit your sources.