Amazon Prime Days ran on July 16th and 17th (at least here, in Canada).
This price jump happened a day before and ended two days later, but this item was “on sale” during those two Prime Days.
I’ve been seeing this scam far too often, especially with food items. Why isn’t this illegal yet?
The ICO in the UK is pretty good… I used to work on their CRM system and it was an eye opener how little, and also how big the things they investigated were.