Keep in mind the example the OP is using; a profit motive doesn't need to exist, the motivation is simply informing the public. If you go to the trouble of creating a website for that purpose, there isn't really any excuse for not including an RSS or Atom feed unless you're somehow still stuck in the "edit pages by hand and upload with FTP" era, or perhaps (I'm being extremely charitable here) if you're stuck in the slightly later "I had to write my own CMS from scratch" or "I'm still using Microsoft Frontpage" era.