To add to that, privacy features that can be offered for free, like tracking protection in Firefox, often are, and thus are available to everyone. Services like

To add to that, privacy features that can be offered for free, like tracking protection in Firefox, often are, and thus are available to everyone. Services like Relay, VPN and Monitor Plus, which require upkeep of infrastructure, are paid or have paid tiers. (Disclosure: I worked on both Relay and Monitor, but this is my own interpretation; I don't set pricing strategy.)