Dropbox shutting down Carousel and Mailbox

Really bad news announced by Dropbox today: they are shutting down Mailbox and Carousel.

There have been rumours floating around for a while that Dropbox is in trouble and I think this confirms it.

The company purchased Mailbox two and a half years ago, possibly paying $100 million. And now they're shutting it down.

If Dropbox really is in financial trouble, then it is good that they are trying to do something about it. But is this going to be enough?