As a business, I think we'll follow the lead of dropbox and evernote. Some variety of: 1) You get a lot for free. 2) If you need even more (or just love us) yo

As a business, I think we'll follow the lead of dropbox and evernote. Some variety of: 1) You get a lot for free. 2) If you need even more (or just love us) you can pay us (My hunch is we'll also have an easy to find "I need a lot of space but am poor." option) 3) You can always earn more space by promoting us Also, once we have collaboration this could be a pretty powerful enterprise tool, and businesses pay lots of money for software.