> If you choose to click on an ad appearing on our search results page, your browser will continue to send the relevant query over the network to enable advertisers to measure the effectiveness of their campaigns and to improve the ads and offers they present to you.

What's interesting to me is they have a double standard: if you pay for placement, you'll get keyword data. If it's organic placement, you won't get keyword data.

I have no opinion, just thought it was interesting.