And they know it, too, because they now possess too much power for any one authority to control. This is the "Sprawl" solution to government oversight: become too big for governments to oversee. Now they can just dodge jurisdictions and so on to avoid regulation. Anyone gets too uppity, use your leverage to take them over.
If sites want to track you, they have the ability to do so completely server-side, meaning you're in a Hobson's Choice, which may not be a choice at all if your job (the only one at hand in this mess) requires your use of this privacy leech.