Wrencher, the last thing I want to do is deprive you of a livelihood and career, but we have to be realistic - I would like to bet, from many situations I have heard of and read about, that many of these people selling photos are no more than Delboy characters making cash no tax sales, and are not using commercial pilots.
In any case, whether legit or not, flying continuously over built up areas annoys people, gets the NIMBYs going and can result in the gradual erosion of light aviation airfields and activities. If you support that way of thinking then you are being totally selfish, not only to the pilots who fly for pleasure but to future generations of wannabes. I hope you're not.