"ANY rule which reduces your rights is unacceptable," explained Theo de Raadt [interview] in a brief discussion on the OpenBSD -misc mailing list, "especially when the full consequences of such a set of rules may be unclear -- which it always is." The comment was in response to a query about why Intel's firmware was considered non-free. Theo went on to explain:
"Normal free software has no 'contract law' issues, because it is simply given away under 'copyright law with almost all author's rights revoked'. Contract law works differently, because it is based more on the principle of 'you got something, now you have to give something back'. The minute you see a URL like that explaining things in such a way, you should realize that the addition of 'rules' means you are in a different legal system.
"Copyright has no way to apply such rules, therefore [the Intel firmware] is not free."