Maybe, but they understand the difference between their principles/licences and the public domain. So does Jay Maisel -- his income depended on it. And at any

Maybe, but they understand the difference between their principles/licences and the public domain. So does Jay Maisel -- his income depended on it. And at any rate there is almost no place in the copyleft world for photographers like Maisel to earn a living at all, so he'd be within his rights to reject it entirely.