$1.5 per review. Give a good review on a kindle ebook. The book is free, you will need to log in with your Amazon account and legitimately review it. You don't need to read every word of the book, just go through first few pages and write something good about it (cover some details from the book), along with 5 start rating. Right now I need 4 review for 1 book. Will need way more in the near future.