What is "Career Choice" in the context of Amazon? Also, I think the claim to have pioneered "marketplace" might be exaggerated. I would say eBay lead in that

What is "Career Choice" in the context of Amazon? Also, I think the claim to have pioneered "marketplace" might be exaggerated. I would say eBay lead in that department, so, unless Amazon Marketplace was around before 1995, I don't think this is correct. Or, am I missing something here? I think the essential bit is having third party sellers, but Amazon does go to some lengths to make it semi-transparent to buy from a Marketplace seller.