One the hand you are right, it might work that way. But on the other hand the QExpo files might do huge traffic and this is something all the free webhosters hate. They would delete your free webspace without turning a hair
And since your hoster offers "up to 500MB of user bandwidth per month for all non-premium users, so long as it is being used in a proper manner" () this maximum would be reached VERY soon. Just imagine some map, maybe 2.5mb. 200 poeple might download it in a month then, that's much too few!