Jokes aside, I don't have a Facebook account, but that causes me to miss out on a few things that have value and are hard to replace:
1] In some cases, public services announce things on facebook and not their official website
2] Community forums and discussion; people who do use facebook generally tell me what's going on in town, but that might not be true for others. Facebook owning and privatizing and locking up behind a login wall the town square is wrong and detrimental to us all.
3] The marketplace for secondhand goods -- garage sales, craigslist stuff, a lot of ebay type stuff, all of it has moved to facebook in many places
4] Not being on facebook does put me in contact with fewer people, perhaps that costs me unknown opportunities
Of course, I gain a bunch of things by not using facebook, too.
1] In some cases, public services announce things on facebook and not their official website
2] Community forums and discussion; people who do use facebook generally tell me what's going on in town, but that might not be true for others. Facebook owning and privatizing and locking up behind a login wall the town square is wrong and detrimental to us all.
3] The marketplace for secondhand goods -- garage sales, craigslist stuff, a lot of ebay type stuff, all of it has moved to facebook in many places
4] Not being on facebook does put me in contact with fewer people, perhaps that costs me unknown opportunities
Of course, I gain a bunch of things by not using facebook, too.