From the engadget/Wired article
"To use Project Shield, a site has to give Google visibility into who's visiting -- something likely to rankle the company's privacy critics. But Google says that it'll only keep logs for two weeks, after which the data will be stored in aggregate and used to learn more about attacks. The company also notes that the data it collects won't be used in its advertising programs."
The company also notes that the data it collects won't be used in its advertising programs. [But by using Project Shield you and your agents and seven generation of your children's children agree and that we can change the Terms and Conditions of use, in a 64 page-long document of legalise, that only 1 in 100 people will ever read and/or notice, at any time.]"