http://bentasker.i2p/posts/blog/software-development/automatically-preserving-linked-urls-to-defend-against-link-rot.html
From people abandoning Twitter to behemoths like Google deciding to turn off once popular link shorteners , there are likely going to be a ton of links that turn dead. Link rot is particularly pervasive on blogs of a certain age, with links that once provided useful context now leading nowhere or, worse, to somewhere completely different .