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That is the only measurable I know of right now. I would love to find out more!
When publishing a feed make sure the links you use are something you can track in your logs as having been used in the RSS feeds.
Don't just use:
Use some that's trackable:
There's also the old "web bug" idea of using an embedded gif image in the content.
As for client-side tracking, actually knowing what they read locally without visiting a web site, there is no reliable method. Nor should there be.
So there you have it, there's good news and bad news - be inquisitive but don't be a nosey bugger.
[edited by: Brett_Tabke at 1:34 pm (utc) on Nov. 26, 2004]
[edit reason] trimed quote [/edit]
You can use FeedBurner for this as well. If you proxy your feed through FeedBurner, we'll give you a number of stats including the circulation of your feed and, optionally, we'll rewrite the link elements to give you detailed click-through statistics.
The one tricky thing with calculating the number of subscribers (that we've invested quite a bit of time in) is categorizing the different kinds of user-agents that hit your feed into bots, browsers,
aggregators ("server-based reader"), and clients. Bots and browsers don't generally "count" as subscribers, while a single hit from an aggregator like Bloglines or My Yahoo may represent a number of
Anyway, feel free to give it a shot.
while a single hit from an aggregator like Bloglines or My Yahoo may represent a number of
And looking at these user agents in raw logs reveals how many subscribers there are with these services.
YahooFeedSeeker/1.0 (compatible; Mozilla 4.0; MSIE 5.5; ...;users xx; views yyyy)
LiveJournal.com (...; ...; xx readers)
Bloglines/2.0 (...; xx subscribers)