fair share of feed traffic

FeedBurner has been busy analyzing, publicizing, optimizing and monetizing site feeds since 2004, and in that time, seen your fair share of feed traffic. In fact, we see billions of hits from feed traffic per week, and we watch this data carefully for trends and opportunities to improve what we do in making sure your feed content is delivered as quickly as possible, as accurately as possible, no matter what its destination might be.
For instance, on the previous post in this blog, we change the link in the feed item for "FeedBurner Terms of Service Update" from

http://adsenseforfeeds.blogspot.com/2009/08/feedburner-terms-of-service-update.html

to
http://feedproxy.google.com/~r/blogspot/MQiv/~3/Z8Es5QuvgEI/feedburner-terms-of-service-update.html

which sends the browser to that original URL, but allows us to first track the click.
As a technical detail, we rewrote these links with a code of "302 Temporary Redirect" which tells the browser or consuming service that the redirect is not permanent, and thus it would need to be read every time.
As of today we are changing this to be a "301 Permanent Redirect" because we've looked at the traffic enough to tell that there some benefit to changing this to a "301 Permanent Redirect" - in that some search engines that index the feeds themselves will consider these to be additional links that should be used in determining the popularity of your site. This is the same way that "URL shortener" services send traffic and get treated by search engines, so we feel that this is consistent with the way that content is distributed today.