A voter turnout group says Facebook served 36.8% of their conversion ads to iOS users after Apple's ATT change, down from 63.6% (Issie Lapowsky/Protocol)

Issie Lapowsky / Protocol:
A voter turnout group says Facebook served 36.8% of their conversion ads to iOS users after Apple's ATT change, down from 63.6%  —  Tatenda Musapatike is as familiar as anyone with the way Facebook's political ad system works.  During the 2016 election and the 2018 midterms …