Why does this exist?
It's for when you need a URL, but you also want to make sure it's safe to use.
It's for when you're writing a tutorial or a manual and know that whatever you choose might be seen for years.
It's a generic domain. To put into your program when you need a screenshot.
It'll be around for at least two years, so you can keep it around when you need it.
So enjoy it. Use it. Or tell me about it.