Remember when Twitter introduced the official retweet option and thousands of users vowed to start blocking anyone that caused a stranger to show up in their stream?* Well, they ain’t gonna like this update from Twitter either.
“Additionally, when we identify a Tweet, an account to follow, or other content that’s popular or relevant, we may add it to your timeline. This means you will sometimes see Tweets from accounts you don’t follow. We select each Tweet using a variety of signals, including how popular it is and how people in your network are interacting with it. Our goal is to make your home timeline even more relevant and interesting.” (emphasis added)