Making Money On QR Codes

This is one of the more creative applications of QR codes - tattoos. $240 to date at $80/tattoo. Given how permanent the code is, I'm wondering if they shouldn't have considered MS Tags - more branding and flexibility. It's the 2011 version of a dog tag. Would be more interesting if these were links to pages with medical records, etc. - something useful in the case of an emergency. Kidding aside, 2D bar codes have a lifetime - whether they live in a print ad, on a book cover, or on one's skin. Those employing 2D bar codes - especially on product packaging - must take into consideration the lifetime of the code and be ready to support it whether it's a marketing campaign or a link to a video with a safety demonstration.