Hello, I can create a system inside wordpress that will auto update from amazon and clickbank, no api needed. For clickbank there is not need for update, product remain the same but for amazon it will update the price. I can create that website for you at that price. 5 categories. Unlimited products per category, it will go a publish 3 to 5 product per 12 hours. I will use a plugin to spin the content before it is publish if you like.