2019-02-23 UTC
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rialtate[m] cjslep: the thing about mentionability is it is a social network, peering social data, meaning, just by exchanging data to operate servers naturally accumulate a lot of peer topology data. Every post that comes in, that is a reply to something else, etc contains actors to discover and once you have grabbed them you have a preferredUsername property to query for mentionability. And as soon as someone is mentioned once by anyone in any post, again