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

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_accessible_resources/googletagmanager_gtm.js https://github.com/gorhill/uBlock/blob/master/src/web_access... This reveals that this has been in uBlock Origin since 2019.