I think you're being a bit mischievous with you definition of customer.
You're really a user; not a customer. Customers pay. Google is selling your eyeballs to advertisers. Advertises are Google's customers.
You're really a user; not a customer. Customers pay. Google is selling your eyeballs to advertisers. Advertises are Google's customers.
And the important distinction if you want to counter the argument that the person you're replying to is making:
Customers pay with money. "paying" with a currency like privacy or convenience isn't actually paying. If you aren't paying for something with money you aren't a customer, you're a user.