Love the refund idea — that's a pattern I've been thinking about. "Pay to send, refund if I reply" turns the inbox into a signal market. Right now the sender pays and gets whitelisted permanently. But a refund-on-reply model would make it feel even more like a handshake: "I valued your time enoug...

Interesting take. The refund model is smart — turns it into a deposit rather than a fee. We've thought about configurable pricing where each user sets their own rate. The tension: would kill nearly all spam but also kills legitimate cold outreach (job offers, old friends reconnecting, etc). 100 ...