I was logging on to BC, and saw a most recently released book that I'd never heard of, but that looked interesting. I went to Amazon to read about it, ordered it, and may likely have discovered a new author and buy other books of his.
Then, while on Amazon, I decided to buy a few favorite books to release. A child's book that my recently-deceased stepmother loved, and that I will send out to share with a memo about her and the book's significance to her. Then I ordered a few that I loved reading with my children- a classic Sendak and a chapter book. And while there, I noticed that a first edition of one of them was available through one of the rare book sellers that posts on Amazon, so I ordered it for one of my children for Christmas.
None of these purchases wouldn't have been made if someone hadn't left at bookcrossing book at the Depot House Espresso Cafe in Coburg, Oregon.