The costs of RSS

In reading the artilce 'RSS Feeds Can Build Web Traffic, but Fence Sitters Note Problems' I noticed an emphasis on encouraging RSS even though there is a limited market of actual users. I am curious as to what the actual costs of implementing RSS are to a company. Not the costs as they relate to customer satisfaction, but, the actual monetary costs. What is needed in increased manpower or time devoted to implementing and maintaining RSS feeds? I love the idea of the convenience of RSS as a consumer especially when it comes to online shopping with auction sites like ebay, however, I am skeptical of the practicallity for certain organizations. I don't know if there are any real costs assiciated with RSS but if so it may not be right for certain companies to implement it right now.