The data is basically what products you like or might like. They sell this to anyone who wants to advertise using Adsense.
Google holds that data and has advertisers come to them, and pay them to make sure their products are seen by the people interested in related products.
And the same thing next week.
And the same thing the week after.
The more information Google has on you to more accurately correlate your interests, the more valuable the data is and the more Google can charge for the access they provide.
Everything Google does to get you to give up more information is Google improving the product they have to sell.
She didn't.
That she made claims about "saleable data" does not imply they've actually offered it up for sale.
See, that's not how words work.