"We may share, or we may permit third-party online advertising networks, social media companies and other third-party Services, to collect information about your use of our Platform over time so that they may play or display ads on our services, on other devices you may use, and on other websites, apps or services, including on social media sites. These third parties may collect information such as clickstream information, browser type, time and date you visited, mobile device identifiers, your use of third-party applications, and/or precise geolocation data and other information."
While Grubhub states it does not 'sell or share' data in individual sections, it separately permits third-party ad networks to directly collect precise geolocation, device identifiers, and browsing data from users for targeted advertising purposes.