The Amazon.com affiliate program (a.k.a. the Associates Program) is the most popular affiliate marketing program in the world with one recent source citing “millions” of affiliate publishers. The Amazon.com Associates program has also evolved significantly since its inception in July of 1996 (as anything Internet-related should in the ~ 23 years of its existence). One of the most impactful changes is in how the affiliate program rewards the affiliate publishers who direct customers to Amazon and recommend various products.
One of the complexities of Amazon’s international Associates Programs is that Amazon JP will only pay commissions internationally with Amazon.co.jp gift cards. This means you can only use them in the Japanese Amazon storefront, which is obviously a challenge when you aren’t based in Japan and don’t regularly shop from Amazon.co.jp.