To be honest, it's this kind of thinking that worries me with people. Everyone writes it off easily because it SEEMS like a small amount, but what no one here realizes is that it's 500 cs PER giftcard. For those of us that are big spenders and buy multiples of these giftcards to meet an asking price, we lose out on a lot of credits. Credits are hard enough to earn, why should trading them be such a hassle? If they made the giftcard as a way to trade credits more easily, there should be no tax. It's essentially a convenience fee when no one is being inconvenienced. While yes, 500 is 100x more fair than 2,500, it's silly to have a tax on it to begin with. You're all very much entitled to disagree, but don't write it off as simply nothing when it is indeed quite something. 500cs seems like nothing, but it adds up quickly.
Look at the math. If you sold an item for 55,000CS and the buyer pays you in 5 giftcards which is equal to 47,500CS, but owes you 55,000CS you're losing 7,500CS, and that has to be made up in other means which is inconveniencing the buyer and the seller. Not just 500 anymore is it? And they can't give you 6 giftcards because that's 57,000CS and now you owe them 2k. It devalues credits as a tradeable market item is basically the gist of it.