It doesn't need to. iTunes Match doesn't care about where you purchased your CDs. If you want to continue buying CDs at Amazon, that's fine. Rip them in iTunes, and iTunes Match will keep them in the cloud.
It is fair to point out that with iTunes match you will not have the pressed CD shipped to you. In addition to the hassle of burning your own, burned CD's can degrade over time. The nice thing about both services is that you can always burn another!
I recommend you read the post I responded to. For someone who bought CDs in Germany through Amazon, their new service is of no help. However, if you bought music at Amazon's site in Germany, iTunes Match will serve you as well as Amazon's site does in the US.
