I do think this production company should just pay their vendors. That said, and assuming that this company cares about the quality of the production and their

I do think this production company should just pay their vendors. That said, and assuming that this company cares about the quality of the production and their relationship with Netflix, I doubt highly they're trying to hire the equivalent of a free intern here. They are almost certainly approaching established, professional photographers for whom it would not necessarily be out of the question to take a one-time 5-day hit on what is effectively a marketing and brand recognition expense for their business. I'm not saying it makes sense for everyone and it would probably seem a lot less sleazy if this production company only wanted a discount instead of free work, but I don't think the fundamental idea of an established professional services business accepting a one-time loss in order to get access to opportunities they otherwise wouldn't have access to is a fundamentally wrong proposition.