> their achievements would go to someone else

It doesn't work like that unfortunately.

Stripe lets you validate address and zip code prior to charging.

I agree with you about the QR codes. We currently support printing on the back, but not on both sides.

Thank you. I'm on it :)

Thanks! I'll post on PH this week.

Thank you! We were hesitant to use QR codes because there is so much friction with its usage. But I love the augmented reality idea, using T-shirts would be a feasible way to make AR interactions work.

I didn't know about NewBase60, so we only allow lowercase and numeric characters, and we picked a font where 0 is distinctly different. NewBase60 looks like a much better alternative, I'll look into it. Thanks :)

Wow, thanks for this :) This is exactly what we thought when we came up with the idea. These are great suggestions. We thought about the benefits at conferences but never thought of couple shirts or shirts referencing other shirts. There’s definitely room for creativity in this area. Thanks again!

Thanks for taking the time. Logo in a QR code looks really cool. We decided to leave shorter codes for later but when we do open them, I'll reserve 1337 for you :) I’ll fix the home link right away and add a privacy policy. Thanks again!

This is a side project where we are trying a new concept and I would love some feedback. If you want to try it, use discount code 'HACKERNEWS'.