I believe that it was an unintentional mistake on TeeSpring's end. Searching for...

		infomiho on May 18, 2021 \| parent \| context \| favorite \| on: Ad block shouldn't break your checkout I believe that it was an unintentional mistake on TeeSpring's end. Searching for the dummy function uBlock Origin uses for window.ga https://github.com/gorhill/uBlock/blob/master/src/web_access... This reveals that this has been in uBlock Origin since 2019.