I have this issue as well on ACD. No new chunks have been uploaded since yesterday. I reauthorized the drive, and that works fine but it still fails to mount.
We don't know. The answer here *entirely* depends on Amazon.
As stated here and elsewhere, once we have a new public build out, we do plan on pushing Amazon for an answer, and I (personally) plan on aggressively pushing the issue with Amazon.... so that we can get some straight answers, be those a hard "No", approval, or hard limitations on the API and bandwidth usage.
But that won't happen until *after* we have a public release.