Facebook has reinstalled reach estimates for its Custom Audiences feature, allowing advertisers to estimate audience size for their Custom Audience campaigns. The feature was disabled by Facebook after a security flaw was uncovered in March, 2018. The update was built to keep privacy, protection and new usage restrictions at the forefront.
From the release: “Since suspending this feature last year, we’ve been working with researchers to improve the security of our custom audiences reach estimate feature,” a Facebook post stated. “With these updates now in place, we are reinstating custom audience reach estimates. We continue to be grateful to the researchers who identified the bug and for working with us to fix it.”
Link: Facebook Bug Bounty
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