100 years ago the letters "NINA" were often included in newspaper help-wanted ads in the USA. Those letters mean "no Irish need apply." Now FB has figured out

100 years ago the letters "NINA" were often included in newspaper help-wanted ads in the USA. Those letters mean "no Irish need apply." Now FB has figured out a better way to handle help-wanted ad market segmentation. They've also, basically, guaranteed that they will be regulated to bring their business practices in line with legal norms in the countries where they accept payment.