Does anyone know what the recent Amazon courtesy credits are for? My account had $13 in courtesy credits and my husbands account had $4 in courtesy credit. We have not contacted Amazon about any item, so this was purely something done on their end. Has anyone else noticed this? I'm just wondering if some of the slow shipping credits somehow were posted differently. I choose slow shipping a lot, but have never had credits show up as actual cash except for last year when you could use them on physical books.