Related to the topic...sort of.
Have you thought about implementing a log analysis program that you can
charge for? Hit counters are nice, but as an accurate measure of web site
visits, they're less than reliable.
HitList is Free (for the Standard version), and WebTrends isn't too
expensive. Both of them make nice pretty charts, and give a bunch of
information to completely inform your subscribers of the web site performance.
/ric