The Infinite Brief

The service benefits advertisers by allowing them to identify and segment potential customers by picking up on contextual buying signals, and past purchases.

Oath’s intrusive ad service allows anyone willing to spend the money to take a peek behind the curtain at commercial emails in any account holders’ inbox — although, presumably, the data would be anonymous.

Those paying Yahoo $3.49 a month for the premium, ad-free experience aren’t immune. The service still scans their mailbox for commercial mailings.