I think this is the black swan of the unsolicited ideas. Do they exist? Sure. I'm sure there's at least one out there. But it's not a case that everyone who wants to talk about swans has to spend a lot of time accounting for. Usually the unsolicited idea is "Clone $BIG_NAME_SERVICE for $500" with an optional rider of "specialized in a fully, profoundly unspecified manner for some set of people".