What exactly does Direct link mean?

Does it mean someone copied the URL and posted it in another forum, website or message board according to the Pbase FAQ, or just posted it as a link somewhere else?

Because my pbase records show that i have only 93 views but 1519 direct links on the picture of my desktop

And my wedding images like this have 25 direct links

And most worrying of all, there have been 12 direct links of my self portrait

I've only posted my pictures on fred miranda, and clubsnap forums. So shouldn't it be only two direct links at most?