Microstock lives of copying. Not that I like it...I got angry like a million times about someone who was copying my stuff.
For most subject, commercially speaking, they have all been covered. What makes a picture using the same subject and object is sometimes, just the model, lighting and angle. All the subjects we use are all a copy of one that was already created, it's just in the way that we treat it that we can make it "different". Every illustrator or artist has his style, some with photography.
