I doubt if it's amazon dumping anything. I believe it's the actual seller of the product. It's up to you as the buyer to determine if amazon had a hand in the development/manufacure or selection of goods sold by the actual seller. Up to this point there have been some buyers who tried sueing amazon for defective products, and have lost.
Here's an excerpt from an article I found. I only bring this up b/c you make it sound like amazon is at fault:
"The 3rd Circuit will hear oral arguments on Oct. 5 in Oberdorf v. Amazon, in which U.S. District Judge Matthew Brann of Williamsport, Pennsylvania, granted summary judgment to Amazon last December. The litigation stems from a horrible accident. Heather Oberdorf was walking her dog in 2015 when the dog’s retractable leash snapped back and hit her in the face, causing permanent damage to her eyesight. Oberdorf had purchased the leash through Amazon, but Judge Brann held the company isn’t liable as a seller under Pennsylvania law because it has no role in the manufacture or selection of goods sold by vendors on the site."
It appears as though amazon is becoming another eBay; good or bad, I don't know.