RSS feed count accuracy?

Ok, this isn't really a bug, i don't think...but i didn't know where else to ask:

In the logs for this module on my site, it says i have 45 RSS subscribers....Is this a count of UNIQUE subscribers? Or is it something else? I only know of about 5 people who have subscribed. Has anyone else found this to be inaccurate? Or are a bunch of people I dont know finding my site and subscribing?

Let me know what you've experienced, please.