Sure, but there are a lot of ethical problems with them.
Imagine starting a service that paired individual shoppers with a passive handler to follow them around a shopping mall to build dossiers including:
* everything they pick up and look at
* what they eat in the food court
* the clothing styles and sizes they try on
* what their transportation to the mall was
* their race, gender, age, and apparent ethnicity
* etc...
It doesn't sound like that at all. It's more like the shopping center hires people to follow you around and write down all this info about you while you shop, whether you want them to or not.
Sure, but there are a lot of ethical problems with them.
Imagine starting a service that paired individual shoppers with a passive handler to follow them around a shopping mall to build dossiers including:
How long would you put up with that?