There are a whole lot of US government employees with access to sensitive information who dont want their real time location available to a hostile foreign intelligence agency. I was lucky enough to start my current job about two months after the entire database of cleared employee personal information (name, DOB, SSN, home address, background check investigation report) was stolen by the Chinese, so this kind of thing is near and dear to my heart.

Additionally the FSB could very well use this data in their persistent campaign of psychological warfare against the entire country. They're smart people, and if they're not using this resource already they probably will by the time the 2020 election heats up.