Amazon is offering a 1.57% discount for users of its new A9 search engine. They’re not promoting it, but when I went to amazon today, they linked me over to this page explaning the nerdy percentage.

Of course, I’m only suggesting that you use A9 enough to get the discount since there are better ones out there. Throw that on top of referral credit and the Amazon.com visa, and you can save a lot.