There have been various discussions are numerous blogs about full or partial RSS feed preferences from the point of view of the reader and of the publisher.
Why some Publishers favor partial RSS feeds:
1) The reader will have to go to the blog to read the full article. Once the reader is there he may find another article of interest to read and purchase an item for sale or give some income to the publisher through one of the monetization techniques on the blog.
2) Partial feeds allow the publisher to see which articles are actually read. This allows the feed publisher to track the interests of his readers. A full feed does not allow this type of tracking.
Why some Readers may prefer full feeds:
1) Partial feeds may not convey to the reader the full essence of the post. The title and the one or two lines seen in the partial feed make it hard for the reader to really know what the full post is about.
2) A full feed is easier to read and if the readers finds it of interest they will forward it to their friends and bookmark it at their favorite social networking site.
3) Full feeds contain links that the reader may click on to related posts and external web sites.
What I do: Right now I prefer to go to the actual blogs to read the posts and see posts that I may have missed. Probably in the future when I increase the number of blogs I visit I will start using a feed reader with full feeds. When the number of blog feeds reaches 20 I will probably prefer partial feeds.
My opinion:Â It seems that people using feed readers are more techie and spend more time on the net and most probably will be not be the type of reader who will click on an advert on your site. Readers that click on ads most probably came to your site from a search engine or a link from another site.
For the blog publishers who would like to give their readers a choice there is a WordPress plugin that allows this there is Dual Feed.