> My experience with Amazon, in this regard, was an eye opener. Today I do not buy anything on Amazon that isn't marked as "Sold and Shipped by Amazon". I want nothing whatsoever to do with their third party sellers.

After all you and your wife went through, this is the measure you've chosen to put into place? You state that Amazon cares more about making money than about "criminal behavior on their platform", so why* would you continue to support Amazon at all? Not to mention the fact that "Sold and shipped by Amazon" is meaningless given that they comingle their own inventory with that of third-party sellers. If you're buying supplements via Amazon, it's entirely plausible you're still directly supporting the sellers that drove your wife to shut down her business!

* EDIT: I suspect the answer to this question is "convenience." So the follow-up question is: at what point does your convenience become trumped by your principles?