Coupon codes are hostile to your customers. http://justinjackson.ca/the-coupon-code-is-a-slap-in-the-face/ … via @mijustin
@tnorthcutt just added that post to HN as well: https://news.ycombinator.com/newest
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@mijustin here's an upboat for you!Thanks. Twitter will use this to make your timeline better. UndoUndo
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