> Keeping it a clean, ad-free reading experience — which is important to me and, I hope, to you — means it’s subsidized by the generous support of readers like you: directly, through donations, and indirectly, whenever you buy a book on Amazon from a link on Brain Pickings, which sends me a small percentage of its price.
http://www.brainpickings.org/index.php/donate/
> Keeping it a clean, ad-free reading experience — which is important to me and, I hope, to you — means it’s subsidized by the generous support of readers like you: directly, through donations, and indirectly, whenever you buy a book on Amazon from a link on Brain Pickings, which sends me a small percentage of its price.
Update: it looks like that and the site's footer explanation of Amazon links were both added recently (they don't appear in the Wayback Machine: http://web.archive.org/web/20130116024042/http://www.brainpi... )