Theres no way this will last. First of all, look how many games there are! http://www.starroms.com/games/browse/all.php . Secondly, too many people know that you can download roms for free and if not, im sure someone will tell them.
The only people who really would pay for this kind of thing would be the same people that pay for (midi) ringtones for their phones.. Morons..