Elon Musk is the most used personality in using giveaways to scam people, I have seen a lot of this some reported and some unreported, I have seen these Elon Musk giveaways many times in Youtube ads and if you are not fully aware of it you might fall on this, people trust what Google ads are showing, it's unfortunate that Google do not have a verification team to verify.
Scammers use the name Elon musk most of the time. The main reason for this is that elon musk is very popular in the crypto community, and scammers want to use this popularity to scam people. Google's advertising is a very dangerous thing. They approve the advertisements of scam websites every day so that the common people are affected in the wrong way.
I think they have, but I don't know if it involves human verification though, it could have been bots that's why the ads keeps popping on Google from time to time. I think it's better to report this sites Google's
https://safebrowsing.google.com/safebrowsing/report_general/. I don't like the word trust though, its subjective, maybe it just Google has become so big that people really thought that everything they show is legitimate.
Yes. They now promote a lot of ponzi scheme websites. I sometimes wonder how they approve these ads. The main purpose of these ponzi websites is to scam, so by approving the advertisements of these websites, Google is helping them to scam.