Dropbox is also terrible toward people who don't want to use their service, in a way that paying users are conveniently unaware of. Someone shares a folder with your free account? That counts against your quota. Once it exceeds your quota, Dropbox will yell at you for exceeding your storage limit, when all you ever wanted to do was view files people have shared. Want to keep a folder available offline on your iPad? Better pay up.

I appreciate them for being an independent company that is doing its own thing in a gradual way. The internet needs more of those. But it would be miserable if they became a major player with their existing contempt towards end users.