Extreme ASIN Merging

Question from an Amazon Seller: How should sellers approach the 'extreme merging' of a lot of ASINs together (which results in a single ASIN with a whole group of UPC's)? Who is doing the merging? Why is it happening? Are these UPC's/GTIN's etc. all legitimate? Are they all in fact the same product? Is the listing tainted? In this episode Chris and Leah dissect the issue of merging product listings and best practices for Amazon Sellers.