Did you mean to link to the entire readme, or specifically the section about the discount widget? Not sure what you are showing exactly :-)
The link goes to the "discount widget" itself for me, though it is actually a widget for validating coupons/vouchers, which is of little interest but still better than what it originally evoked (a widget for displaying discounts)
Actually it's a part of our product http://voucherify.io but one can untangle it and use as a standalone component as well.
Probably a better idea to repost your original Show HN. We'll email you a repost invite.