Continuing gender bias in who sees job-opening ads on Facebook (https://www.technologyreview.com/2021/04/09/1022217/facebook-ad-algorithm-sex-discrimination): if an employer or industry has historically skewed male or female, Facebook replicates that bias, even for pairs of ads with identical qualifications. This is illegal, but Facebook appears unable to find a technical fix and unwilling to apply the obvious fix of not targeting its ads even when that targeting is illegal. Via https://news.ycombinator.com/item?id=26760790 but (as usual for that site) don't read the comments.
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