How do I know I have four readers?

I recently asked the maintainers of http://blogs.gotdotnet.com if
they kept access stats on my blog; I was curious if anyone actually read it. 
They sent me to a web page with a ton of stats and charts; on one of those, it says
that over the past month, my RSS feed has had 6151 “views”, and 2995 “visits”. 
I’m not sure what the difference is, but lets be pessimistic and take the smaller
number; about three thousand.

Now, I figure my readers, being high-tech folks, have their aggregators set up to
poll every hour.  That means each one polls about 25 times a day, or 750 times
over the past thirty days.  I remember enough math to know that 3000 divided
by 750 equals four; the number of readers I have.