Meta knowingly earns 10% of its _overall_ sales from scams. https://www.cnbc.com/2025/11/06/meta-reportedly-projected-10...
(Could also argue that the scam ad that won the slot for 10 cents would have gone for 9 cents without the scam and Meta's marginal revenue was only 1 cent... but if every ad is 1 cent more...)
Same problem when you want to buy a home in a place where real estate became a means for money laundering or uninhabited store of value