Earlier quoted context omitted.
They've been offering it to most of the clients I used to work with in the grocery industry, Mercury is matching it too. Might not be available to every SIC, but perhaps its a good excuse to buy into a small grocer that does $150k/month in processing and run all your volume through that. Grocers pay among the lowest rates for credit card processing, I think that was a big part of Amazon's very loud attempts at grocer…
Sorry but it utterly defies belief that Amazon were able to reduce their MDR by loudly pretending to be a grocer. The banker scans the document with a frown. He strokes his chin thoughtfully. "Amazon.. Amazon. Where have I heard that.. Oh yeah, the grocer! Zero basis points!"
Back on topic, different SICs[1] get different interchange rates from Visa, Mastercard and the like. Multiple companies have sued to lower certain SICs interchange rates[2]. Amazon's SIC has changed over time, and it could easily be argued that they fit into multiple SICs.
Its up to the sales org that handles them to appropriately code their SIC, Amazon could easily have switched to processing with a new platform for Amazon Fresh, and slowly moved most of their volume over without negative repercussions from Visa/Mastercard.
1 - https://en.wikipedia.org/wiki/Standard_Industrial_Classifica... 2 - https://en.wikipedia.org/wiki/Payment_Card_Interchange_Fee_a...