Dropbox is not a social network, but they still have a (softer) network effect. For all of my personal syncing I use BitTorrent Sync. However, because a few f

Dropbox is not a social network, but they still have a (softer) network effect. For all of my personal syncing I use BitTorrent Sync. However, because a few friends want to share files with me, I'm still a Dropbox customer.