A new scandal with Google wants the company to secretly provide targeted advertisers with a "stock" of credit card transaction data.
After a four-year negotiation, Google and Mastercard reached an agreement in which Google would pay millions dollars in exchange for providing data from cardholders, according to a Publication by Bloomberg. Google then packaged the data into a new tool called Store Sales Measurement. 
This tool allows company customers to track how many of their online ads are actually being sold.
All well here, only none of the companies have informed their users about this setting. This for Mastercard, means that most of its two billion customers do not know they are being tracked.
"People don't expect that what they buy in a brick-and-mortar store can be connected to what they buy online," Christine Bannan, a consultant at the Electronic Group, told Bloomberg. Privacy Information Center. “Υπάρχει ένα υπερβολικά μεγάλο φορτίο δεδομένων που οι εταιρείες λαμβάνουν από τους καταναλωτές και δεν αναλαμβάνουν την ευθύνη να ενημερώσουν τους χρήστες για το τι κάνουν και τι δικαιώματα έχουν.”
Last year, when Google first announced its Store Sales Measurement service, it claimed it had access to "about 70%" of US credit and debit cards. The markets which are made from cards with the signal of Mastercard account for about 25% of all credit card transactions in the US, according to financial research firm Nilson Report.
Although Google did not name its affiliates, the 70% rate that it said serves indicates that Mastercard is not the only credit card company it works with.
Visa and American Express did not answer the questions of the journalists investigating the case.
A spokesman for Google said to TNW:
Before we launched this beta product last year, we created a new, two-fold encryption technology that prevents both Google and our partners from seeing your personal information of the respective users. We do not have access to personal information from our partners' credit and debit cards. We do not share personal information with our partners. Google users can turn off web and app activity controls at any time.
Although users have the ability to disable offline tracking, most do not know that there is such a possibility but also the an exception tool that says the company says nothing about tracking offline markets.
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