Logging is the recording of data about your usage, and it occurs everywhere. Every website, at minimum, records an IP address, time, and data accessed so they can track traffic. All VPN providers have to check credentials against recorded personal data to make sure you paid, but a few let you sign up with Bitcoin, allowing you to hide your identity.When we say a VPN doesn't log data, we mean they don't track what sites you visit and for how long, but they may track how much of their infrastructure you use.