@sodamnqueer most used would make sense, but that would require the server to either (1) regularly survey a hashtag for changes to popularity or (b) survey the whole hashtag whenever the autofill function is called, both of which get quite expensive!
@inherentlee that makes sense! I am very much *not* a techy person so I usually chalk most things I'm curious about that don't have clear other causes (ie bigotry influencing choices) up to 'probably caused by something I don't understand enough to get' lol