Great question — answering as the UphillTech team:
For amazon.com Yes, you get advertising fees for third party (as they now call them) products. https://affiliate-program.amazon.com/gp/associates/help/t2/a12/176-0224023-1997146 : What are the referral-fee rates for third-party items? You earn from 4% to 10%, depending on your shipped items volume, under the Performance plan. […] Third-party items are defined as any product sold by a third-party seller on our site, as long as it is not an Auctions or zShops item. Products sold by third parties through sites linked to from our site, e.g., Shutterfly.com, are also excluded. For amazon.de Yes, you get advertising fees for marketplace products....
Full answer by unor: https://webmasters.stackexchange.com/a/55679 (CC BY-SA 3.0).
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