They were all the rage when we were developing NIP-17. Many, many people told us to just use their system instead of building our protocol. It looks silly now, but I am glad we didn't follow their way doing business.
quotingIt’s sad to see Simplex fall into the tempting smart-contract blockchain token trap.
nevent1q…wyv3
This is also why Keychat uses ecash sats as postage stamps for messages.
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