Same in the real world, cameras in stores can track all of your movement. For small private businesses I don't care, the problem is when it is done by governments, monopolies or industries. Group vs individual.
Discussion
There’s no way all of this data is not sold to some 3 letter agencies.
Sold? Small private business doesn't have enough to sell, but you could argue that through central hubs 3 letter agencies still end up with that data.
There are data aggregators for small businesses that definitely mine and sell all of the data from physical store traffic. This is literally the business model of Foursquare.