You could also consider having a limit of 1 or 2 private projects and make all the others public.
If you give public mockups a publicly accessible page and create a base representation that is indexable by Google, it might be an interesting source of additional incoming traffic (and leaves you open to become something like SpeakerDeck for Mockups.)
If you give public mockups a publicly accessible page and create a base representation that is indexable by Google, it might be an interesting source of additional incoming traffic (and leaves you open to become something like SpeakerDeck for Mockups.)