A friend of mine recently also got a scammer's message... At least I think it is from a scammer (how could it not be?). The sender claims up to 2k USD income per day, withbitcoin mining (I almost choked myself reading this), and you cash out after getting enough new people with a referral program. Well. I never saw one this absurd, but I think there are no limits to this...

Personally I think Facebook is one of the less trustable places when it comes to ads! The only online offers I would trust are probably the ones from official stores on well-known online marketplaces. It's not that we have trouble trusting people, but... It's really difficult in this era.