Hi Brad.
Hope you enjoy my essay on Usury.
nostr:nprofile1qqsr3gwdr05shx5f35jpthqsrhcgwrc4kuh2y0xmpt0647kgp5p06zgprpmhxue69uhhqun9d45h2mfwwpexjmtpdshxuet56m0w9j has a great book on this too, called Modern chains.
https://konsensus.net/article/usury-your-bank-and-you