Yes, of course. We provide a free service in exchange for you (hopefully) using our webtool before you purchase from Amazon.com. So that we can earn a small cut from Amazon, which we can use to keep this site running. As the buyer this has zero effect on you except you may get some money back if the price drops in 30 days. And also, as many websites do, we join google adsense program, and hope someone many find some interesting websites and click through it.

Thanks to all users who help to keep our site running!