I think the key here is "old". It's their OLD hiring puzzles. They worked because they did them first, in a new an interesting way. So much stuff on the intern

I think the key here is "old". It's their OLD hiring puzzles. They worked because they did them first, in a new an interesting way. So much stuff on the internet (and business in general) thinks that "hey, it worked for someone - it must be a new paradigm!" The people who wrote those puzzles would never think of writing them as incentives to join their company now - because that idea has long-since sailed. So much of the crap part of hiring (and business in general) is because it involves taking something unique and interesting that someone has done, and rehashing it until it's a hollow, shallow, uncreative version of its original effect!