I'm surprised no one has mentioned friends https://github.com/JacobEvelyn/friends a command line tool that does a lot of what Monica aims to do. A Ruby gem that will be "friendly" only to laptop users, but with a wide community and continued development.
Why is this scummy exactly? If a salesperson was to try to sell to you in a store, they would take into account how you appear and act to tailor the sale. There's nothing wrong with that. Why is it suddenly bad if a machine does it?
Because when you talk to a salesperson you know you're being looked at (and reciprocally you're looking at them), and human memory is limited so it's unlikely they will retain any "data" about you when the contact is finished.
Here, instead, there is no indication that you're being watched, analyzed and kept recorded for indefinite amounts of time.
If you find the subject interesting I suggest reading "The white road" by Edmund De Waal. It gives a more human, broad and intimate insight into the history of porcelain both in China, Europe and... the USA.