When you usually pay your purchases via merchant, the payment processing company only gets the total value of items. They don't know what you're buying. Now Google wants to get all that data too - name of the porn movies you buy, what food you eat, how you never buy any condoms, and how you bought a book that tries to teach you self-respect. They get all this information, when you buy it and where you go. Soon you began seeing related ads everywhere. Your Google searches will be full of "lose weight" and "not getting laid?" advertisements.
I wish there was a payment processor I could pay extra for not trying to fuck me in the ass all the time. But compared to Google, they're just like little kids fingers. But Google, no. Google is the 500lb gorilla that will do major damage to your anus. And it will be bloody, and it will hurt for a long time. I'm getting sick and tired of that, and I hope no more people give in. It's the same issue with software. Who wants to have adware on their computer? Who wants to be tracked all the time? Well, if your primary business model is in the advertising business, that's how you make money off people. Your customers aren't the people using software, they're advertising. When I'm buying software from lets say Microsoft, I know what I will get. I know how they make their money and it is in their best interest not to lose customers faith. We, the people using Microsoft's products, are the customers. Not some shady advertisers who's primary goal is to violate your privacy and steal your hard earned money.