This type of photography is permitted in the U.S. under the legal premise established by the Supreme Court that there is no reasonable expectation of privacy in a public place. It is why we may be photographed or recorded many times a day by surveillance equipment, police bodycams and anyone else with a camera.
What Sells Best On Shutterstock?
Some types of photos that sell best are Portrait Photography, Food Photography, Landscapes (usually with people) and fine art photography (artsy).