The Amazon affiliate program is better for those who want a large variety of products to promote. Amazon offers a vast selection across many categories, and its trusted brand attracts a wide audience. You can earn commissions ranging from 1% to 10% based on the product category. The eBay affiliate program, on the other hand, is ideal for promoting auctions and unique items. eBay offers higher commissions for certain categories, but its product selection isn't as vast as Amazon's. Amazon’s conversion rates tend to be higher due to its established reputation, making it a solid choice for most affiliates.