How to Protect Yourself Against Digital Services Shutting Down Apps can change their terms, or go away completely. In the next few months alone, movie locker service Ultraviolet and social network experiment Google+ are closing their doors for good, while photo sharing platform Flickr is shifting the rules about free and paid-for accounts. The moral of the story? Even digital services don’t stick around forever—but you can protect yourself against your favorite app or site pulling…