Why would your personal data be safer with an advertising company? Google is amassing personal data so they can charge higher rates for their so-called targeted/personalized ads. With all your personal data residing with a single ad company, it will be far easier to offer discounts to certain people, in-effect introducing tiered insurance pricing. The health insurance companies just want to figure out a way to charge sick people more, and healthy people less so they can maximize their customer base. It won't happen overnight, but then again Google started with the mission of organizing the worlds information. Hah, how often do you hear about that from them? You can barely go past page 10 on search results from the "millions" of supposed results.