Serendipity Forums

Anyone have a "simple" way of placing a random advertisment like say at every hundred posts within the rss/atom feed without actually posting it as an article?. Just I'm finding im getting alot of newsreaders bumping the feeds.

It can be done with a plugin.

But as I don't support and like the idea of Ads in Feeds, I won't help any further. I'm sorry.

Regards,
Garvin.