Just bringing this back for the simple reason of touting my even stronger love for Dropbox.
Being a resident PSM who ended up buying Dropbox Pro (as did my Assoc AD) so that we could work together on files - I had been working with staff at DropBox for about 1.5 years, seeing if there was any way they would consider donating a Business account (which I think was what KMC was calling "teams" 2 years ago). After not hearing anything for 3.5 months, I suddenly got an invitation to be the Admin for my company's very own, non-expiring, $0/year, 50 licenses & 50 TB of storage business account!
I am very excited to embark on this new world of Dropbox and how the work environment can be improved at my ballet company. For one, to avoid dipping into my assistant's personal Dropbox accounts, they have always used the network to access my computer, get on my Dropbox that way, and get into my files. (Not my favorite thing, but it was the easiest way to go.) Now with the business account, I can create accounts for the company's computers/generic emails (not the people), and we can link what we need to, (no one needs to log into my computer and see all of my personal dropbox stuff - and yes, I know about selective sync). And yes, you can still invite people to folders, if they are outside of the company itself - for those that are freelance SMs.
I for one, am very excited - and who knows - recommend that someone at your company contact Dropbox. Perhaps they'll offer a free Business account for your art group. I've been at the ballet for a long time, so this is major for me, and I hope it sticks around (and remains useful) long after I'm gone.