>I don't think that means that buying direct from Amazon can get you third party inventory.
I've sold on Amazon via FBA. Yes, it does. If you are selling a new item, you ship it to Amazon warehouses. Amazon informs you, the seller, that your item is not distinct from that of Amazon's or other sellers' FBA items. Inside their warehouse, it is just an item with no seller attached to it. If someone buys it, they just find any that match the SKU (or whatever it is called) and ship it.
Buying direct from Amazon can get you third party inventory. Amazon mixes their inventory for many product verticals with third party vendors and will ship out counterfeit goods "sold by Amazon" according to numerous product reviews on their own site.
It sounded like they were saying that "fulfilled by Amazon" inventory is mingled with other inventory in the same category, rather than that it is mingled with "sold and shipped by Amazon" stock.
I've sold on Amazon via FBA. Yes, it does. If you are selling a new item, you ship it to Amazon warehouses. Amazon informs you, the seller, that your item is not distinct from that of Amazon's or other sellers' FBA items. Inside their warehouse, it is just an item with no seller attached to it. If someone buys it, they just find any that match the SKU (or whatever it is called) and ship it.