Why is everyone keeps getting scammed by something so obvious and repeatedly happened? If a big company like SpaceX really wants to hold an event like that, what should they do to prove people that they're real?
It's because there are still people who blindly trust SpaceX/Elon Musk and everything he says. And scammers are using him to capitalised on his projects popularity. So scammers will (1) hacked a Youtube account with a lot of subscribers (2) change the title of their channel (3) used Musk name to promote their scam.
So the best weapon is to educate ourselves, read the signs and red flags about this fake giveaways and whatever so that we don't fall for this kind of gimmicks.