[kyeb]

The interesting part about this idea to me is the scalability.

If you're someone looking to cold-email someone you admire, you're willing to spend a dollar to do that.

If you're a spammer who plays number games with your emails (maybe 0.01% result in a successful clickthrough), $1 per email is not even close to worth it.

I haven't thought through all the consequences yet, but this seems like a super interesting idea to me, with the potential to kill off the low-probability-of-success emails that I get hundreds of per day!