Another interesting option for making money from a well established, high traffic blog is to write reviews for other blogs/sites/products. People pay you to write the reviews and publish them. Of course, you shouldn't publish a review that is about a bad product, otherwise you'll lose your reader's trust. But if you can find a product that is decent quality and serves your reader's purpose, there is no reason not to recommend that product to your blog readers. What are your thoughts on selling blog reviews? Good way to earn money or breach of reader trust?