KeepCart: Stop Coupon Leaks

Great app. It quickly found many leaked coupon codes, it was able to ask for coupon take downs on its own as well for some of those.
The protected link is a great way to create secret codes so they can't be found online.
I was unable to test the code blocking for coupon extensions as you need to be on Shopify Plus for that (that is a Shopify restriction, not something the app controls)