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That's not true at all. It only disables the cache if you tell it to. Like so: http://i.imgur.com/dutc1cy.png.

As you can see, that checkbox is not on in the demoed GIF.

The ad code is actively requesting new ads and pinging its trackers countless times.

ok, sure, it's configurable. But that box is checked by default.

1. Not for any installs of Chrome I've ever had.

2. That's entirely irrelevant in this matter because it was not turned on.