My blog's obviously suffering from a severe spam attack at the moment. I can't fathom out what the point of it is though.

What exactly does a spider/crawler/spambot do?
What commercial advantage accrues to anyone?
Why are all these pageviews logged on my blog.co.uk stats page but not on my two external stats plug-ins [something to do with Javascript I think.]?

Canada - From Sea To Sea

Costa Rica - Pure Life

Greece - Liberty or Death

Kenya - Let's work together

Luxembourg - We want to stay what we are

Mauritius - Star & key of the Indian Ocean

Netherlands - I will maintain

Norway - Everything for Norway

Puerto Rico - John is his name

United Kingdom (Royal Motto) - God and my right