Subscribing: Yay or Nay?

I've recently been thinking about a question I have: what is the purpose of subscribing to someone's YouTube page? My personal feeling is that there is no point in following someone's personal videos because most of the time they are simply for entertainment purposes and are not anything you would seriously share with anyone...they just seem like they're for fun. So why put the effort into following them and subscribing to their page?

I believe I'm confused about this phenomenon mainly because it doesn't seem to fit into my idea of social media and making connections online. Facebook, Twitter, and LinkedIn are all meant to share interesting information, make genuine connections, and build and keep relationships for the future. In other words, these ways of connecting represent a real connection to you. When subscribing online, you get lost in the thousands of other subscribers, so where is the personalization? What do you as an individual get out of being one of many followers? There is no give and take, just watching and commenting without really knowing if the people in the videos will take the time to read all the comments. As you may be able to tell, I am unfamiliar with subscribing to someone's channel, but I wonder why someone would do so. For instance, there are some videos that I have found on YouTube that I find to be really funny, but I have never considered subscribing to someone's page. Do you know of anyone who has, and what they might do on a weekly basis in relation to their subscription to that channel?