I had some MP3 download credits through movie ticket purchases, so I finally decide to spend them and this:
I was literally toggling back and forth between iTunes and Safari, thinking do I pull the trigger with Amazon or pay out of pocket with iTunes because I know it's going to work, there's just about no risk.
WTF do I do now? In no way do I want to contact f***ing customer service to buy an album.
Instead I find the link to Your Cloud Player under the Account menu, find the album, attempt a download, have to install the downloader, get told a download failed repeatedly for a song bought like a year ago, and finally the download for this purchase succeeds, but still says some imports failed for the old song. I have iTunes Match, so I then go into iTunes, wait for matching to complete, then delete all the songs and download from iCloud to get AAC files.
Simple.