You think they all study each others sales for a slow moving stain remover?! lol... Are you aware of how many products are in these stores?..
C'mon man, you cant claim in one breath that no one knows about WC, then in the next breath try and convince us that the biggest retailers in the industry are keeping tabs on how its fairing in their competitors... They might do this for Coca Cola, but not WC
PS: Products come and go in these retailers all the time. Jones soda has gone in and out of Walmart many times... as well as 1000's of other products. Its part of the retail world