ISI is not a big company with millions of $$$ and they're not releasing a "game" as f1 2011 or something you'll find in your gamestop near home so quick;
they'll probably put more effort in working the software than spending resources to publicize it...After all,if you know about rF2 as all people here,probably have known about rF1 for the good ones about it,not for the "spot" on tv or games-magazine;
by the way,if the red bull f1 team uses rFactor PRO I think they've no doubt about the success,even if you warned them

C'mon guys reeeeelax
By the way,if R. Barrichello,Massa and some others real life drivers uses rF's clone to entertain theirself in spare time or training, I think that publicity is already enough to know about ISI's existance