Doing it yourself
- Write a payment webhook, then keep a server running to catch every sale.
- Prove each "they paid" message is real, separately for every provider.
- Sit and wait for the slow ones. Crypto clears in minutes, mailed cash in days.
- Log every sale and reconcile it against each provider by hand.
- Build the whole thing again for each new way you want to get paid.
Your code, your server, your 2 a.m. call when it breaks.
