This is just a factor of how math works. Anyone holding US equities, which has historically returned 7-8% inflation adjusted per year for over a century, would see their wealth roughly double every 7-10 years.
No, Twitter changed its algorithms leading up to the election. That was not self selection. They were actively pushing right wing bullshit down everyone's throats because the owner spent $200 million trying to get the dipshit elected.
Which is no different from any of the US social media companies tweaking their algorithms against criticism of all number of political things.
Twitter blatantly forced right wing radical propaganda down their entire user bases through a for months. Facebook was selling user data to foreign influence groups to assist with political message targeting. They're all the same.
The fact that there are people who don't want to release it means it's pretty damning. You don't try to bury reports that imply your party member is innocent.
AI is definitely already here. AI will be scraping anything public facing it can reach