I know I'm swimming against the tide but....
... but I really don't care about stuff like this.
A shop knows what I bought! *shock horror*
A shop knows how I walked around their store! *shock horror*
As has been pointed out already, online shops already know about everything I buy from *online shop* so what? take Amazon, they often seem ahead of the curve and yet pretty much every recommendation I ever get from them is for something I've already bought.