An explainer on digital advertising's header bids, third-party brand safety vendors, and "evercookies", illustrated by a ubiquitous pajama onesie ad (Shoshana Wodinsky/Gizmodo)

Shoshana Wodinsky / Gizmodo:
An explainer on digital advertising's header bids, third-party brand safety vendors, and “evercookies”, illustrated by a ubiquitous pajama onesie ad  —  If you're reading this, you might have read the juicy piece that Elle dropped this weekend chronicling how a former Bloomberg reporter torched …