Amazon already gives a discount if you're willing to wait for them to batch deliveries. Personally I would still have an order arriving every other day regardless of walkable/bikeable infrastructure. Same as most Americans.

Do most American's have an Amazon delivery every other day? It's not what it feels like where I live, but I might live in a part of the country unusually avoiding Amazon. While I see an Amazon truck every day, they visit 1-2 houses around me out of hundreds.

If feels like there are Amazon households that get a delivery every or every other day and non-Amazon households that order 1-5 times a year (if that) and batch their purchases from other retailers (physical or online). That's the genius of Amazon. Those that use them, use them a lot.