Hi,
If you add your CSS file with a link like that <link rel="stylesheet" href="https://link/style.css">, AcyMailing will replace all the links in your emails to count the clicks.
So if the mail client needs to load the CSS file it will count as a click, this is why you have 90% rate on that click.
It works like the open tracking:
https://www.acyba.com/acymailing/155-acymailing-statistics.html
We'll make an exception for the CSS files 🙂
