Go figure that the interview in which this happens is also the one that gets to the top of HN for the longest time. In the future, I'll do more to verify the launch dates so I don't end up with another interview where the average revenue is such an extrapolation.
As for including revenue numbers in titles, I agree it is a bit clickbaity (or at least very enticing). But at the same time the entire point of these interviews is transparency, and highlighting the revenue numbers adds crucial context. I'm happy not to include revenue numbers in titles, though, if HNers or mods don't want to see those.