[Drew68]

“Oh, you won’t do it? then you aren’t in the scene and don’t get paid. Goodbye.”

I remember this story. If they didn't agree to the shoot (and surely, some didn't), they'd have to pay their own way back to whatever town they flew in from.

[goldstategop]

In a free market, both sides get something out of the transaction. Its not exploitation as long as everyone understands the terms and know what they’ll get out of the deal.