Another even more egregious example -- around 10 or so years ago, I was a big proponent of the writing website Urbis. It was a site where you could submit a piece of writing and get feedback from other users. You can still see its activity on the Wayback Machine. It was an interesting site still without equal as far as I can tell.
From what I understand, one day, the creator decided that the site wasn't making him any money and shut it all down. I foolishly didn't back anything up and all my prose was gone. Granted, my teenage writing wasn't about to win any awards or woo any publishers. But some of the stuff I wrote was meaningful reflections on experiences at the time, meticulously edited and reviewed, and I still wish I would have been able to read them now.
What really irks me is that all he had to do was give me one day and I would have been able to save all my stuff. I have very little sympathy for any company that does anything like what Rachel describes here.