In my opinion, this is a Pocket/Instapaper killer, and one of the most underutilized features on Facebook. Recently, Facebook added the ability to save any Facebook post for later reading (and even videos, photos and ads). I often use it to follow interesting threads without getting annoying notifications on every comment. It's extremely simple to use: just click the small arrow in the corner of any post and select "Save Post". To see all your saved posts, go to: http://facebook.com/saved
My use of Pocket has already decreased significantly.