What a great idea – “recycle” some of those advertising dollars back to the environment! We are so bombarded online with annoying ads constantly reminding us to buy-buy-buy. The reason they are there is to fund the web site you are visiting. “Real Estate” – just posting the ad on the site – turns some revenue, but the big bucks are in click-through, and bigger bucks if you make a purchase as a result of a click-through.
This is due to sales affiliations. Online retailers will pay a percentage of the price of the item purchased using a click-through link. For instance, if I was enrolled in Amazon’s affiliate program, I could write this blog all about the greatest invention ever (sliced bread, right?) and provide a link to purchase it on Amazon. If you click the link and buy it immediately, I get a portion of that sale. I don’t get a portion of any of the other items you add to your cart.
GAS takes this concept a step further. They provide a little “bookmarklet.” Before adding anything to your “cart” when you shop online, click the GAS bookmarklet. This sends the notice that you clicked-through GAS to make that purchase. Keep clicking the bookmarklet as you add stuff to your cart, and when you make the purchase, a portion of the sale is paid to GAS. GAS then donates 100% of the profits to the organization that registered users have voted for. This month, that company is Conservation International.
How much money are we talking about? This varies with each online retailer’s affiliate program. For Amazon.com, see the Referral-Fee Rates below:

I see two big questions here – first, is this fair to the “little guys”? Shouldn’t advertising revenue go to the site that you actually linked-through to purchase? Second, is this fair to the “big guys”? Will the Amazon’s of the world shut down GAS as soon as it gets popular? It seems likely that they’ll notice the link added to every item in a person’s shopping cart pretty quickly.
I think I’ll “green” my purchases whenever I go directly to the shopping site (which is most of the time), but not when I legitimately click through from another site. I’ll use it as long as it’s around – probably not for long!