[Clutch Martin]

Google already tracks credit cards and purchases made at certain stores. When you walk your chip card through those metal detector looking things at the entrances that’s scanning your card. I know this my nephew works in the industry and he told me several years back. And then I made the connection of when I go to a store and make a purchase I come home later and go online and on the sidebar up comes A very similar ad for a product that I just purchased or perhaps another brand of a product that I just purchased. So put two and two together. Maybe the newsworthiness of this article is that they made a deal with MasterCard, however they already had a deal with other credit card companies.

[RushIsMyTeddyBear]

Bkmrk.

[Albion Wilde]

When you walk your chip card through those metal detector looking things at the entrances that’s scanning your card.

Line your wallet with aluminum foil wrapped around a piece of cardboard, or with mylar, like from a balloon or a potato chip bag. Or buy an expensive RFID purse or wallet (radio-frequency ID).

[kingu]

There's no scanning of the chips in your card when you enter a store. Google simply tracks your phone via pings off of GPS and cell towers. They know when you entered the store (approximately) and when you left (approximately.) If the settings are right on your phone, they even know which departments you went into in the store.

How do you stop that? Just leave the phone in the car or disable the GPS (it'll still activate when you dial 911.)

[catnipman]

“When you walk your chip card through those metal detector looking things at the entrances that’s scanning your card. I know this my nephew works in the industry and he told me several years back.”

this makes zero sense: chipped cards weren’t in wide use “several years back” ... have you got some other source for this information besides your nephew from several years back?