Any developer or company that completes the application process will receive a discount code that reduces the cost of registration to attend.

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All you have to do is download the app and register a credit card, enter VOTEHAILO as a promo code and the discount is applied instantly.

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By scanning a bar code in the store, Amazon would give the customer a 5 percent discount, up to five dollars.

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Its algorithm weighs your personal tastes and repurchasing habits against those of your peers: if the code senses you'll be relatively stingy, you'll get a better discount.

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