When I subscribe to someone who already has thousands of followers, why not tie this user to metadata vectors that will categorize my feeds?
(source) Now: to subscribe to someone's updates on social media.
A word like "follow" (to subscribe to someone's Twitter feed), and the symbols @ (denoting an online name) and # (a "hashtag," denoting a searchable topic) have specific meanings on Twitter that have begun to migrate across the entire Web and beyond.
Twitter is a rather asymmetrical medium: users who subscribe to someone's "feeds" (postings) are not automatically considered a peer of the tweeter (sender).
Facebook wasn't kidding when it announced yesterday that an embeddable button allowing people to subscribe to someone's public updates was on the way.
And favorite a video or subscribe to someone.
People are more likely to subscribe to someone who is regularly producing content as opposed to someone who uploads every once in a while.
Methods such as 'Subscribe for Subscribe' (where you subscribe to someone so that they can subscribe to you) require a lot of work should you suddenly get a lot of requests and a lot of YouTube users are against systems like it.
