The problem of Facebook nowadays is that they aren’t regulating or reviewing these ads carefully before approving. They should dig deeper by looking at the website if it’s legitimate or malicious. As these scams on Facebook ads cannot be avoided, at least newbies and beginners should use their common sense and ask the experienced ones to check the ad’s legitimacy instead of getting in to the hype immediately without doing their own researching.
You are right, now Facebook is no longer filtering real ads, even anyone can enter the ad without strict supervision, so more and more fraud will occur on Facebook social media compared to other social media, even with a blue tick it's just a disguise a lot of fraud committed by them.
Common sense must really be used, anyone who gives an airdrop or some kind of unreasonable giveaway must be suspected and reported.