Google will roll out a new tool enabling advertisers to link people's offline credit card purchases with their online viewing histories. The company says it can access around 70% of credit and debit card transactions in the U.S., thanks to partnerships with outside companies. Data won't include people's names, but that may not be enough to preserve consumers' anonymity. "If anyone’s looking at your digital breadcrumbs, they can be reasonably sure you are you from shockingly little data," Consumerist writes.