It's probably a bit controversial to say this, but haven't large sites had to deal with these problems for years by the time the likes of Facebook/Twitter/YouTu

It's probably a bit controversial to say this, but haven't large sites had to deal with these problems for years by the time the likes of Facebook/Twitter/YouTube/Instagram/whatever came around? I don't think at the same level. Social media usage went from 10% of the population to 79% from 2005 to 2015 and was even lower a few years before this. So current social media companies operate at unprecedented scales. Moreover, the smaller percentage of people usage social media in earlier times tended to be "sophisticated users" who didn't necessarily expect their feed to be systematically filtered. https://www.pewresearch.org/internet/2015/10/08/social-networking-usage-2005-2015/ https://www.pewresearch.org/internet/2015/10/08/social-netwo...