https://www.theregister.co.uk/2019/01/14/facebook_lookalike_audience/

Analysis Imagine a store where you go in, pay money, and sometimes leave empty-handed. That's digital advertising on social media in a nutshell because it's seemingly full of fraud.

Simon Arthur, founder of custom parts maker Big Blue Saw, believes he had more or less that experience buying Facebook ads. In a blog post on Friday, Arthur recounted how he paid Facebook to boost the exposure of posts made to his company's Facebook Page and received attention from what he believes are mostly fake accounts.