So one needs ecash to send message? Is it fixed rate? How does it work exactly?
Users choose which relay to use. Relays set their own prices, although some may offer services for free.
Interesting. How do one get ecashu?
Using your lightning sats to mint ecash sats. https://image.nostr.build/61805b646754bcfc514dcd4065cdd99886a0ed01755dbfaef59c70012a230727.jpg