I chose Dropbox years ago partly because their marketing and terms at the time strongly implied that paid accounts would keep files indefinitely as long as the subscription was active. Recently, however, they began deleting inactive accounts’ files—even paid ones—after a certain period of inactivity, with a policy that apparently changed after I signed up.
Whatever the fine print says now, this felt like a bait-and-switch to me and cost me data I thought was safe. My takeaway: never fully trust Dropbox they are liars.