From what they describe on their FAQ page they just use crafty ordering techniques and deals to save you money. They aren't necessarily parasitizing sales from

From what they describe on their FAQ page they just use crafty ordering techniques and deals to save you money. They aren't necessarily parasitizing sales from Amazon and sending them elsewhere, they are just taking advantage of savings techniques and coupons that already exist. It's like meeting up with your friend outside the store to go shopping, and he has a big binder full of coupons that he's cut out of newspapers and circulars, and he has a credit card that he uses when checking out that has a nice rewards bonus. He uses his coupons and reward bonus to save you money and pass the savings back to you. In return he keeps a portion of the savings. So Amazon might not have that big of an axe to grind with them because its not really hurting them that much. But I totally agree about the cat and mouse issue. I don't think this company has a very solid business model, because if history shows anything its that these kind of browser extensions require constant updating to keep them operational, especially if the website is actively trying to block them by changing the DOM, JS, etc. The ongoing development and maintenance costs of keeping this extension operational are going to severely eat into any minor profits that they make, especially if Amazon closes or limits some of the savings exploits / coupons that they are using currently. Still I wish them the best of luck in their venture. I'm sure it will be a fun and interesting project for their devs, and if they succeed at becoming profitable all the better.