Tangential question, since I use feeds but am not an expert in this: why do some feeds lose the articles after sometime while others don’t? Say I have two feeds from two different sites. The newsreader shows only the most recent (10 or 20 or whatever) articles for one feed whereas it shows all the articles from the time I subscribed to that feed for the second one. I know that the feed XML itself contains only a limi…
RSS is also commonly used to serve podcasts, and I've been told by a number of podcast hists that they like this because it prevents someone from sticking the RSS in their podcatcher and blasting the server with requests for every episode all at once.
I'm guessing that a lot of RSS generators have this as a default, and many of the people with their RSS set up like this simply never change the default.