Just as a heads-up, this appears to be for US residents only. Here is a snippet from the terms and conditions:
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The Program is open only to confirmed registered members of
www.eBay.com who (a) click on an eBay paid search advertisement marked with the Live Search cashback logo, (b) are legal residents of the United States, (c) have a residence located in the United States tied to their account on
www.eBay.com, (d) are eighteen (18) years of age or older and (e) satisfy the requirements set forth herein and in the Microsoft Program Terms;
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That would have been a sweet way to get a discounted SAM440!
