> you have to just look at the ~30% that is direct from Amazon.
Except due to commingling you might get something from a 3rd party Fulfilled by Amazon instead of Amazon's supply chain.
> And with first hand experience with Amazon's Vendor program they go further than a lot of other retailers in pushing costs onto their vendors such as making them eat returns etc.
I know Walmart is very severe with their vendors, do you believe Amazon is worse?