It's running on a fairly current version of Apache, but aside from keeping the server up to date, it conceivably could be running the same setup for years.
For an organization the size of Warner Bros, it's essentially free, as they are literally doing nothing to the server for that site specifically.
However, it does look like it's running on AWS using their global accelerator (globally optimized traffic) so I assume it's sufficiently robust.
so how would you make it bullet proof, just s3 and cloudfront?
so what would you say it costs a year to run?