As I understand Jot, the breach of security is that you are not allowed to look at the files (like you are not allowed to hack the FBI and look at their files and download them) you are only allowed to look at the product of the file which would be the website. But not all files are “active”. Pic. Scout only chance to view a picture is to download your files and compare the data, because Pic Scout can not see the product (website) Since Jot had a security installed they had to go through it to get the files like somebody who has to hack the FBI server to get some files.
Like: You watch a movie on a public server but you are not allowed to download it to your computer. Therefore they blocked it for downloading. But Pic Scout has to download it to watch it and they "hack" it to get it.
(I am not an expert too)