Sup PM?
I have the answer to your question.
Note to readers: I'm an American and a former international trouble maker that helped Occupy Wall Street go global by drawing people to live stream activism in 2011.
Having reported on hundreds of protests, mostly in DC, NYC, & Baltimore, our ability to reach viewers was completely unrestricted until the winter of 2012. YouTube, Livestream, and UStream all targeted left political content. They gave everyone a warning that they'd be purging content without consent to create a reserve on their servers. This was the first shot over the bow. Throughout Occupy, our team of activist journalists worked with various anonymous on political policies, workers issues, protecting whistleblowers, and other things by effectively constructing and deploying Twitter Storms that would trend on Twitter regularly. By 2013 both Twitter and Facebook throttled the left activist reach to a point that it we might have been reaching what seemed like a half dozen of out regular contacts. Between 2013 - 2015, I attended several hacker conferences to and made friends with some of the EFF folks. I was told there's nothing anyone can do about it. Companies had the right to restrict users.
It hadn't been until just about 10 months ago, I noticed activist groups getting big follow and views. It was overnight @YourAnonNews gained an extra million viewers. BLM groups for a while gained similar attention, all of a sudden on Twitter. Facebook doesn't seem to have changed, though.
I've been mostly out of all this stuff since the 2016 election when I got fired from my radio station job in DC for flooding twitter and facebook with the contents of the DCLeaks. My view was that I didn't care if it was surfaced by Putin, the content was worthy of discussion.