Still yes, I agree that a few hundred million a year gets you control of the Internet.
With Chrome they can build a profile on each user which includes how much time they spend on every site they go to. They can sell and use all this profile data in all sorts of ways.
They can fine tune search results to push more sticky sites, since they can aggregate which sites really keep their users.
And it means that they can verify that their other tracking cookies and methods are accurate, and can better weed out all sorts of shtick, and pick up the trends before they are bitten.
Controlling the internet (by controlling the interface used to reach it) is just the small change.
EDIT: Actually, now I'm curious about the methodology of how the numbers are collected. I know that Servo is designed to consistent of independent components contained in separate repositories whereas IIRC mozilla-central is fairly monolithic, so if you look only at the repo at https://github.com/servo/servo you may be underestimating the the activity on the project.