Is amazon's model even profitable for these low-price high-volume parts without its binning system?

I literally do not buy things off amazon that fall into these "binning problem" categories, or anything easily counterfeitable. I'll buy from amazon for things that essentially cannot be counterfeit (GPUs, hard drives, things where counterfeits would be more likely to be a brick of the same weight rather than something that worked but was crappy or dangerous), or where i'm essentially trying to get "counterfeit"-grade stuff (stuff like plastic or metal garden spikes, where i just want the cheapest possible thing that will hold my irrigating tubing in place).

Everything else comes from target or the OEM's website store.