Following up on an earlier post and something of Chad’s on the same topic, I decided to actually keep track of subscribers.
The best I can come up, given no registration, cookies, or other unique identifiers, is this:
egrep '(xml|rdf|atom)' httpd-access.log | awk '{ print $1 }' | sort -un | wc -l
That works out to 53 or so. I’ll run this at a few minutes before midnight (since logs get rotated then). The result will appear in the lefthand nav column.
(The logic, such as it is, is to find all instances of the files used by aggregators, pull out the requesting IP addresses, sort for uniques, numerically, then count ’em. )