I'm not sure what her support page used to say, but it seems perfectly clear at present. In the same sentence she both says she wants to keep the site ad-free A

I'm not sure what her support page used to say, but it seems perfectly clear at present. In the same sentence she both says she wants to keep the site ad-free AND confirms that one of the way she does this is through affiliate links: "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." Seems like she's being fully transparent.