This makes a lot of sense. Clearbit itself also has a Chrome Extension that lives in your Gmail and has over 200.000 installations. If they track the IP of anyo

This makes a lot of sense. Clearbit itself also has a Chrome Extension that lives in your Gmail and has over 200.000 installations. If they track the IP of anyone who opens one of their users emails, they should have huge coverage. Do you think this is their source of data? (Clearbit extension: https://chrome.google.com/webstore/detail/clearbit-connect-supercha/pmnhcgfcafcnkbengdcanjablaabjplo https://chrome.google.com/webstore/detail/clearbit-connect-s...)