As reported on by CBC news and others:

https://www.cbc.ca/news/canada/vietnam-canadians-fake-ai-9.7...

https://ici.radio-canada.ca/rci/en/news/2151393/more-fake-cb...

https://mediatechdemocracy.com/en/publications/ai-scam-platf...

general search: https://www.google.com/search?client=firefox-b-d&q=cbc+news+...

It seems quite obvious that Facebook knows and doesn't care, because it's revenue.