I was going to sign up for this on Friday, but it makes you buy a minimum of 5 licenses, so the lowest monthly payment is $75. I thought that was pretty lame so I started looking for something else. I tried ownCloud but it was not very happy with my PHP configuration so I quit that and ended up using Synology's Cloud Station and port-forwarding it. Costs $0 extra to me since I already have a Synology NAS, local storage, easy configuration that doesn't interfere with any existing services, and clients for mobile, Mac, and Linux (GUI only unfortunately).

All of that would've been avoided if I could've just paid Dropbox $30/mo, but I guess I'm glad they priced themselves out by trying to force me to pay for 3 users that I'm not going to have for a long time.