Facebook admits around 10% of their ads are fraudulent. I think it's much higher.
The scam is even larger than you see and exploits missing children reports. There are huge automated scam networks that post missing children reports then get people to share them. Then once the post/ad gets traction they change it to a listing of a house that is auto pulled from public information. They then use that to scam people.
PleasantGreen has a series on it. https://www.youtube.com/watch?v=uud0wTAOxSc
What is the point of listing a house that isn’t for sale, though?
Probably collecting application fees from people interested in renting it.