[1] https://www.zdnet.com/article/microsoft-offloads-20-percent-...
Or work (LinkedIn)
Probably not, no matter how you prioritize the two prongs of that, and no matter which construction of war chest size you take, since Alphabet and Apple both less social media involvement (though Alphabet has tried in the past to have more) and more cash on hand, while both Apple and Amazon have less social media involvement and greater market cap.
As long as they did reasonable CYA then they cannot really be held accountable.
That's what the law is. See item 12 here: https://www.ftc.gov/tips-advice/business-center/guidance/com...
Microsoft used to have a Passport service that could verify a user, just add in an ID to verify age scan your driver's license or whatever and send it to Microsoft passport. It is an extra step but you don't want the kiddies looking at nudes and violence and hate speech.