Because you don't have a #Monero address on your profile.

Raw JSON

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  "pubkey": "e4e847f9b3e29e930b3f05218767828f8ddd5ac177f5ad46a6616f52e5c37d6d",
  "created_at": 1788643005,
  "tags": [
    [
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      "wss://bitcoinmaximalists.online/"
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    [
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    [
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    ],
    [
      "client",
      "Amethyst"
    ],
    [
      "nonce",
      "305rdL",
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    ]
  ],
  "content": "Because you don't have a #Monero address on your profile.",
  "sig": "97cc6e59317ac401e11de880b2254a672e8f525847e69c2eb1d8f731d38228b5b1cd6e04c9bbaf06bb2b39a4a2c581651d0558b04a418d84f6336da268673cd0"
}