How traceable are giftcodes? Say I sold an Amazon voucher, that's got to be traceable back to my Amazon account, hasn't it?

On the other hand, if I bought an Amazon voucher on ebay, then used that voucher to buy bitcoins, it's a little less traceable because there's one more layer of obfuscation, but I imagine it's still traceable.

What level of traceability do others here find acceptable?