NITA BHALLA RIGHTS groups are calling on Meta Platforms to seize the opportunity to improve its content moderation in Africa after its main third-party contractor in the region said it would no longer screen harmful posts for the social media giant. Kenya-based outsourcing firm Sama said on January 10 it would no longer provide content moderation services for the owner of Facebook, WhatsApp and Instagram in March as it moves to concentrate on data labelling work. Sama said it would be laying off 3% of its staff - about 200 employees - to streamline its operations and boost efficiency. It…