The OpenBSD policy page doesn't agree with you:
"...That means that having granted a permission, the copyright holder
can not retroactively say that an individual or class of individuals are
no longer granted those permissions. Likewise should the copyright
holder decide to "go commercial" he can not revoke permissions already
granted for the use of the work as distributed, though he may impose
more restrictive permissions in his future distributions of that work."
http://www.openbsd.org/policy.html
Chris
-