Having worked on a product in a similar space, they probably weren't monitoring any one in particular. They were just trying to get a feel of how many 'individu

Having worked on a product in a similar space, they probably weren't monitoring any one in particular. They were just trying to get a feel of how many 'individual users' are really companies sharing a single account, and a good way to understand that is just looking at how long someone has been online and active.