The author cites some idea of "trading" ongoing collection of personal data^1 for features but I can't see how that applies here, assuming the user has already paid for the product, e.g., he has already paid for the headphpones.
1. This does not appear to be a one-time, voluntary submission of data by the purchaser. For example, submitting one's name and a product serial number in order to register for a warranty.