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?
Many places are totally fine with only putting an item on “sale” less than every month. If you keep 1/4 of you items on sale, you’re covered, even if you only keep something on sale for a single week.