No, he can do that regardless if it's BSD code, as long as he keeps the copyright notice intact. I can take any BSD code, close source it, develop it further i

No, he can do that regardless if it's BSD code, as long as he keeps the copyright notice intact. I can take any BSD code, close source it, develop it further inside my company, then sell it as a proprietary, closed source app. Or re-license to GPL.