[HadiAsiaie]

Shouldn't unique IP be unique cookie? Because IP is not that much unique, two people can have the same IP and both surfing hackernews.

[jacques_chester]

Lots of people read HN without creating accounts.

Quite a few people hit HN as part of a Google search.

One of my blog posts gets a steady stream of visitors every day from people looking for comparisons of Chef, Puppet and cfengine; they come across from a link I made in a HN thread.