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)

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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 …