Those "generics" you're talking about are ordered by your friends from overseas. The average American won't take advantage of Modafinil until they can pay x10 as much to buy it in a pharmacy in their neighborhood.
People are too risk-averse to try things that work. Hmm... if only there were some sort of drug they could take to make them smarter?
Define "risk averse" I used to buy modalert from India and, based on its effectiveness, I feel confident it was not a fake. The biggest risk, I found out, is having a shipment confiscated by US Customs as it is a controlled substance. I received a letter telling me on no uncertain terms that if they found another shipment of modafinil addressed to me, they would prosecute me as a drug smuggler. That was more risk than I was willing to take. Since even the so-called generic modafinil in this country is so expensive, I now take Ritalin instead of modafini. Ritalin is available in a cheap generic in this country, but has side effects that the modafinil didn't have.
Due to agreements with the patent holder, Cephalon, that were made in 2005-2006 several generics manufacturers are now allowed to sell generic Modafinil. I have found confirmation that the manufacturer Teva has begun selling generic Modafinil, though I haven't seen news about other manufacturers. However, the article also, says that Cephalon is a subsidiary of Teva, so perhaps this won't have an effect? The Modafinil patent is set to expire in April 2015.