Actually guys if you read the print it says, and I paraphrase here "Give us your reasons for buying 3Com cards ..."
Nowhere does it say that it's a requirement to have already bought one to qualify for this offer. In fact, at the bottom when you put in the amount of 3Com cards that you've purchased there's the magic box "0" listed. So, you can honestly say that you are planning to get a 3Com card in the very near future and not have to go to hell for saying that!
Anyways, i'm seriously thinking about a 3Com card anyways. I can get a 3Com card where I am for not much more and I will be able to sleep at night.