https://arstechnica.com/information-technology/2021/10/facebook-outage-likely-caused-60m-loss-impacted-small-businesses/

In a major outage yesterday, Facebook, along with its sibling sites, WhatsApp and Instagram, became unreachable for hours. Real-time website status tracker DownDetector received over 14 million reports from users who couldn't use the social media giant's apps and services.