Three reasons: - Self promotion (Hey check out this thing I just wrote/made) - Facebook market. It's nice to have what is essentially a Craigeslist with a bui

Three reasons: - Self promotion (Hey check out this thing I just wrote/made) - Facebook market. It's nice to have what is essentially a Craigeslist with a built in messenger (don't have to give my phone number/ email), that I can stalk who I'm buying from, and is easy enough to use that it gets high traffic. I've been doing this since before the market place when Facebook selling groups were everywhere. - Event discovery/notification. A lot of smaller events don't seem to have email lists, or are bad at updating their website. The facebook event is normally up to date. Beyond that I don't really pay attention to my feed, I don't actively add people, and I've only really talk to one person via it's messenger (he won't switch to something else).