Cool to hear. Is it less intensive on their server, too? Also by different stuff do you mean for example XKCD #404?
Well, I'm not sure how more/less intensive it is on their server. I don't know how more or less intensive it is to access JSON or an RSS feed.
As for "different stuff"- no, not like 404, but sometimes they post information about their site store or other miscellaneous news in the RSS as opposed to new comics.