There is absolutely no reason a reptile company should exist on using shelter animals as feeders. If they can't afford it or want to use shelter animals to turn a quick buck at a reptile show, they absolutely should not be in business. They deserve as little sympathy as you have for the Arizona shelter staff.
I couldn't afford to buy frozen rats when my collection grew past 14 last year. I didn't start skimming craigslist and the local shelters for handouts. I started breeding my own feeders.
I haven't seen all the updates and digging into things as again... I was recovering from surgery. Last week when this broke all we knew about was fertile turtle. Now that the rest of the info is falling into place, the shelter deserves just as much scrutiny and anger for their part. But trying to say the brothers were just looking for a way to get business started? It makes you sound like you agree with the practice