Originally Posted by cabble

Jesus, the support on this site is amazing, thanks!

"Of course there's no guarantee that you won't be caught sooner or later, especially on higher-level trackers."

I just wonder how they could do it on a technical level if my IP changed?

Sites don't log only your IP's, they also store various details about your internet connection, your computer itself (some specifications for example) or even your browser (like what extentions you have installed for instance). All these things together form a unique "footprint" sort of speak, through which they can identify you if they suspect you of something.