[Spooky23]

It's a harder problem than it seems to be as many real Facebook users behave similarly to spammers. If you take some action that affects 0.1% of users, you piss off over a million users.

Also, nobody is screaming about this, and they make money off of it, so I doubt the motivation is there.

[dilemma]

Even though it is fraudulent, corporate customers like this because they get better KPIs to publish in their internal reports.

This is why Facebook advertising is popular; not because it is effective.