Gift-codes are usually bought by PayPal and there is so no credit card information whatsoever stored in the cracked account information. Since people sell the codes for a cheap price, it can be taken as they are taken from a cracked account, but since the code needs to be un-used they are pretty hard to get. However, if you have 9000 cracked accounts it will be more likely that even some account will have un-used gift code.
EDIT: I would also like to appoint that many of Steam accounts in here are also cracked, but you just wont notice the difference at least so easily, because the sellers sell them for a reasonable price, since they all have email accesses. These are usually granted after trying to log in to the email address with the same password as used in Steam.
Then we could think about the moral part of cracking, which I allow myself for so long as the real owner has no bad effects about it. By that I mean using ex. filehosting accounts or playing with Minecraft accounts can be done so long that nobody changes the password or cause any other significance problem to the owner. That is the biggest problem since many buyers are trying to grant the whole account to themselves, which after buying something does make sense. However, it is funny to see some cracked accounts of my, which I have tossed to other forums for absolutely free, are tried to be sold in here. This is pretty funny fact.
I may promise that if someone is interested and in need of accounts, I may give them 100 premiums, but only if they promise to not change password or benefit on them. If Sythe staff needs them, I may give them, if some clan needs them, I may give them. But only for the one option; no password changing.
This is my opinion about the topic.
And oh yes, I'm a cracker.