You cannot compare Florence to Rome. And I cannot imagine, that Rome would be a smaller succes than Geneva.
Don't take it for granted, we did several italian sceneries in the past. The best selling one was, incidentally, Aviano, probably because it's not entirely italian, being a NATO a/b. However, still as a "best selling", it sold way below our recent products and our expectations for a commercially sustainable product.
US-Airports will surely better selling than italian airpots, but isn't the amount of making a KJFK is much much greater for an italien designer-group, than making a LIRF?
No, and that's precisely the point. Considering the effort of making a major airport like LIRF is about the same as KJFK, why should be makign something that has a 1/4th sales potential, at best ? Being closer to the place doesn't change anything, because we wouldn't be able to take the kind of pictures needed in any case, so we need to rely to existing documentation, and that quantity and quality of it is far greater for US airports and, incidentally, Swiss airports as well...
Cloud9's LIRF had a very hard opponent in ISD-Freeware in FS9
And guess who was the designer...
I'm assure you: he lost money on that specific project. We have already been there and done that, as they say...