catcher on Nostr: what's with the fee?

{ "id": "17b6bb2eb94628027aa55dfcbb4b328f6779f7e17ed6d0fb40202e3937e3e4f1", "pubkey": "9dd283b1bdcea8cab10a8bca1d1677f7117d3e87090a1bd401cfb21fcf9b6beb", "created_at": 1765273995, "kind": 1, "tags": [ [ "e", "e115e9dc832dfdad54660c84f114cb32575184cd2f82a239312370bf73d1688b", "wss://nos.lol", "root" ], [ "p", "4598d26e6c60420e079559829000087bd0044daded6584287b8d796c4efca716", "wss://nostr.mom/" ], [ "p", "3f770d65d3a764a9c5cb503ae123e62ec7598ad035d836e2a810f3877a745b24" ], [ "r", "wss://adre.su/" ], [ "r", "wss://purplepag.es/" ], [ "r", "wss://relay.cxplay.org/" ], [ "r", "wss://relay.damus.io/" ], [ "r", "wss://relay.primal.net/" ] ], "content": "what's with the fee?", "sig": "c6563979de6931108383e0472199c7c78772686d2e2a0da1879a90cd6b520720cb5bee780484427878cb3904f0943fffd04fc0ccd4c5adaabfd4bd56d3fc1f6e" }