This is problem with these platform that anyone can place any ads if they spend some money. If a project needs to be verified by the team or any 3rd party to run ads in google or twitter then we would have seen a quite improvement in the ad industry as well. Though it is practically expensive to do, this is just an idea. Every time I go into twitter some ICO sale pops up or some dude asks about minting NFTs. By seeing all these, I do realize that we should cross check a project to other legit platforms if we get to know about it on social media and interested in it.
It's a problem almost everywhere, lol. People should learn how to be safe on the internet and how not to click on every link and perhaps these scams would become less big and common.
It is logical to accept that everyone will not be tech-savvy. There are a generation gap between tech and non tech people and there are still people who are from nineties so they are not that used to all those internet things. Also sometimes those ads show something on the frontend but they have used phishing links on the back end. People don't get conscious as long as they fall for a tarp and learn the lesson. These types of people still exist in the new generation, and the only thing we can do is expect some spread awareness measures from these platforms.