Self-Managed Gitlab tracking

We are using Self-Managed Gitlab without any premium package. Gitlab is hosted on a private cloud. If I want to upgrade my free version to a premium version, I know that they provide us a license file that needs to be uploaded.

  1. Since our Giltba instances are in a private cloud, how does Giltab track the user information etc.?
  2. If we continue using Gitlab free version, do they have any system to track our activity and user information etc?

I appreciate it if someone could explain this from a network standpoint.