I'm using a click-tracking script to count subscriber growth on my blog. Is that a good idea? My concern is that robots will upset the tracking and inflate my stats artificially. Also, I used to do this with an external script, clickaudit, but that showed extremely high growth; When I compared my traffic to the traffic of a friend with a similar subscriber base, she had multiple times more visitors, making me doubt the accuracy of my own stats.
Note: here's what my robots.txt reads, so you know: