WhatsApp is where you talk. kwataverse is where you get paid.
Show the code
https://kwataverse.com/p/naddr1qqgkjurgdahx2tf3xykh26edw4ek2eqzyqgjrvhg5r0x5k9n3r4936se6aykw85nzzspe0nk787mktw36u5n5qcyqqq8dssr9a00c
Point a camera at it. A neighbour across a stall can too.