So you're just selling gift cards at face value out of the kindness of your heart when you could just as easily simply transfer funds to MtGox and buy BTC.
Anonymity is a nice thing to have in a world of increasing government intrusion. Not everyone is trustworthy of giving their name, address, passport numbers, picture ID's, etc. to Mt. Gox and least of all to companies like Dwolla. I help provide liquidity to spend bitcoins anonymously in the fiat world we currently live in.