Feeds not worth it?

As a follow-up to a recent post, I found the following article that warns that there is less money to be made from feeds than through other avenues. There are some good points in the article, but the author finally comes to the conclusion to not have feeds would be limiting, he only thinks we should not encourage feeds in general. Again since I'm learning about how all of this really works together, I'll remove the feed capability from one of the sites and see if there is a difference in revenue. With my current low numbers it may not make a difference. However, I did notice a 6 penny jump in revenue when the feeds were initially turned on.