It is likely that Amazon dictates terms that don't leave the agency another choice. I don't think the owners of the agency will make a lot of money either. Creating such an agency isn't too hard, so if AHC doesn't comply they'll find someone who opens up a new one and delivers the same price again.

In my opinion Amazon is at fault. A company has to know the contractors it works with. It's a similar argument as with child labor. Just because a subcontractor that produces for you exploits children doesn't mean that it's not your fault. Companies, especially at that size, have a duty to closely monitor their whole supply chain for violations of laws and ethics.

I agree but it wouldn't be a headline if the title did not include a well known name like Amazon.

Market power gets you headlines, so it isn't exactly surprising that there is overlap between abusive labour practices and making the news.