Did a search here on SD and only saw an old 24% off post.
I was looking at buying a 3XL USB C Mophie power bank for my Ipad Pro and the one I wanted was $199 at Zagg (only them and Apple sell it and both for $199). I did some research and saw that last Black Friday it went down to $139 so decided to wait.
When I went to the Zagg website yesterday to check I saw they have a site wide 40% off sale with the price reflected in the cart. When I put the 3XL in my cart the price went down to $119.
40% off is good until something like 12/08 but went to verify and their website says it is temporarily down.