Last year we began testing a quality filter setting and we’re now rolling out a feature for everyone. When turned on, the filter can improve the quality of Tweets you see by using a variety of signals, such as account origin and behavior. Turning it on filters lower-quality content, like duplicate Tweets or content that appears to be automated, from your notifications and other parts of your Twitter experience.
It seems to me that every Twitter user is really demanding on the free service, expecting it uphold principles of free speech and filter hate speech from their feeds and not get any money for doing it. Twitter is iconic, every commercial and celebrity is constantly peddling hashtags, and yet there’s no clear way forward for Twitter to profit on that.