What I don't get is them on one side pushing this at the IETF to "convert" it into an RFC and at the other side requiring that license agreement to be signed.

What I don't get is them on one side pushing this at the IETF to "convert" it into an RFC and at the other side requiring that license agreement to be signed. Doesn't the IETF disallow something like that? I always thought that specifications defined in RFCs were free to implement by anybody.