"... I added this so that when there are rss feeds for comments ..." Nice my own personal garbage rss feed. - does the rss option kick in for all users or kar

"... I added this so that when there are rss feeds for comments ..." Nice my own personal garbage rss feed. - does the rss option kick in for all users or karma > n? - any idea of how many entries? (20?) - will personal rss result in an extra hit on the servers?