Adding an RSS feed is easy. Individual writers and hosts have no good reason for not including them. For groups / publishing houses that are not techinically bent generally use publishing platforms that generally support them. For the minority thats excluded from the above, hey, just a shout out and someone will be ready to help (me included). But thats not the real problem, the lack of ads on rss feeds (which is its biggest appeal to me) warrants the lack of attention rss feeds get.