Here's a phenomena you all know: you search the web for some info or answers regarding some issues you have. While doing so, you come across a blog that looks interesting and that provides the answer you seek. After wondering around in that blog you decide to add it to your RSS aggregator.
Few months later, you try to read the stuff queued in your reading list, and don't understand why is it that you have a "1000+" label saying you're gonna spend your entire day sorting it out.
Some of the blogs you're subscribed to are no longer relevant to you anymore. Others has changed direction and now you don't find them interesting. There are other cases as well.
This is a good time to use the unsubscribe feature of the RSS aggregator.
This is exactly what I do today. I no longer need to follow all of those KDE related blogs. I don't develop anything for KDE anymore, and I barely use it.
The "holes in the net blog" ceased from being interesting. Now it's just full of marketing stuff and social media topics.
Other subscriptions will be removed as well. Finally, I can focus on what's important.
But hey, don't unsubscribe from this blog, OK?