Hi, thanks for the feedback. The extension that userstyles.world redirects you to is Stylus not Stylish. It’s a fork of Stylish and they even state on their web site that “Any and all analytics, telemetry, and data-collection have been removed completely. We’d rather not know what you’re up to.” https://add0n.com/stylus.html
I hope this clear things ;)
Torille