Here's a chart of their Canada rankings: http://www.appannie.com/app/ios/budget-with-back-in-black/ra...
Looks like they only do well in English-speaking markets, so they'll mostly live and die by their US performance. So it's more accurate to call them the #75 finance app (that's about where they seem to hover). $80k/yr to be number 75 in your biggest market doesn't seem quite as bad.
An interesting question is: why are they #1 in Canada? In the US, there are dozens of better selling budget trackers. What's different about Canada?