How is taking our browser history to serve ads respecting our privacy?

A search suggests they made $311 million in 2012, how much money is actually required to run Mozilla?

The same amount of weight is still being placed on the road causing wear, perhaps it affects the 4th power rule the other posters are mentioning. That said, dualies in particular are much more likely to be towing or hauling increasing their weight even further.

The point is that the gas tax is a better approximation than charging every vehicle the same amount. (Barring electric and hybrids which are still a minority)

Is security really that big of a deal? Isn't the intent to run it on a private network to crunch numbers behind the scene?

We don't ask about the susceptibility of safety deposit boxes to crowbars and dynamite, they're inside a vault.