How many users are just hanging on? I use FB very occasionally for some events, but mostly never login. I get nagging notifications about how much I'm missing, but it doesn't feel like much. I suspect there is a growing population of people with similar usage patterns. Are we really monthly active users?
I have three use cases that keep me there: 1) I'm in a couple specific regional groups that AFAIK have no non-Facebook counterpart (though they easily could). I think Facebook does groups poorly, but they serve the "non-technical community space" use case much better than any other popular offering that I know of. 2) It's the easiest way for me to blast low-key questions/updates/etc. to most of my friends and family.…
These used to be called "forums" and were very popular until Facebook invented groups and murdered them all.