In my experience, it’s product-related blogs that tend to do best with Amazon. Most blogs probably have at least some possibilities (for example here on ProBlogger I occasionally link to a book that relates or a computer or electronic tool that I think might be useful to bloggers) but the reality is that this blog will never convert as well on Amazon as my photography site.
Amazon Associates is one of the first online affiliate marketing programs and was launched in 1996. The Amazon Associates program has a more than 12 year track record of developing solutions to help website owners, Web developers, and Amazon sellers make money by advertising millions of new and used products from Amazon.com and its subsidiaries, such as Endless.com and SmallParts.com. When website owners and bloggers who are Associates create links and customers click through those links and buy products from Amazon, they earn referral fees. It’s free to join and easy to use.
As an affiliate for Boatbookings, you will receive 20% of their revenue - effectively meaning your commission will be about 4% of any sales from your referrals. You also receive 10% of any commissions Boatbookings make on repeat customers who were your referrals. They do have a minimum charter value of 3,000 ($/€/£/etc) before commissions are earned.