Sounds good, right? Wrong! Check this out:
All Cambridge asks in order to provide this service is
that the author, or their institution or funding body,
pays a fee to cover costs associated with the
publication process, from peer-review of the submitted
manuscript, through the copy-editing and typesetting,
to online-hosting of the definitive version of the
published article. The charge that will be applied for
each article is £1500 / $2700.
So if you want the right to give your work away, you have to pay
Cambridge University Press £1500. I don't think so!