Prices reward people who do work that there is an unmet demand for in society. If society already has an oversaturation of professional photographers (so much so that clients feel they do not have to compete at all), the low price of $0 for professional photography work will hopefully encourage some of these glut of professional photographers (and others looking to enter the field) to pursue another profession where they can add more value.
If Netflix's contractor here has set the price too low, well then no one will apply, and they will have to set the price higher.