You don't have to donate boinkster, there is really no difference as long as you're invited, which you have been, by several people, so relax and stay.
I just hope that if I do get an invite and it's sent through mail, brad sends it to shapefactory@yahoo.ca and not the e-mail adress I put in when I registered here because I can't use that one anymore.
It's not like an official invite type thing, it's more a case of one (or more) of us donor-types puts your name forward and Brad gives you access to all the forums. Don't worry, several people have invited you, so you'll get forum access soon enough.