No. It's not. Many want to know the answer.
I think most of us know that the reason this guy excerpts his own articles, is that he's pimping his blog.
Having read the silly excerpt, however, I'm more than happy to avoid the blog itself.
It’s a group blog with many different writers. Excerpted in this case due to the links, video etc. at main article. Normally I do not excerpt and post the entire article.