Yes, that's really funny. But even funnier, I can't think of a 1-1 English word, and even Google translate gives me tariff. It's actually just "price", but in the context of these kinds of services, could be also something like "tier" (but not to be confused with the German Tier :-)).
But that's normal for languages, the meaning of a word can adjust to the point a meaning previously used becomes archaic. It's obvious these two words share the same for lack of a better word gist, but the actual usage diverged later.
