Why blog: a clear explanation.
Worth of weblog-based publication?.

Clay Shirky: “Weblogs and the Mass Amateurization of Publishing. [...]

So,if there is little likely monetary reward why would one work on creating , however polished, a written summary, a body of ideas, on the web? I believe that there are rewards for doing this and they relate to making a community of understanding with those that do respond to your ideas.

As a benefit of community membership one receives relevant suggestion and criticism of her/his ideas. As another benefit, this interest-based community also provides new and related ideas from which one may continue to build her/his knowledge base. There are benefits for all. In short, be wiser and happier in your knowledge making web community, but don’t quit your day job!!

[Connectivity: Spike Hall's RU Weblog]
[Seb's Open Research]