odette, IMHO, you are interpetting the new Google policy wrong. It says accounts. it does not say invites. They can't stop people from exchanging invites for $ or barter, since it is an invitation.
The new policy change is to discourage people from regging up all the good names, so that the general public will only get shopgirl333, instead of shopgirl. And to keep people from having multiple account. The latter might be because Gmail doesn't handle multiple accounts in seperate windows, or so I've been told.