I have been doing it on and off for years and the truth is
I HATE IT....
I like making pieces of Art and Architecturial Products for use in the real
world where the the consumer sees, touches and compliments me on it when comparing it side by side with my competitors.
And anyone who has seen a computer system I have written in the past has thought they are elegant and effacable and referred me for more business.
Essentially I develop a product and advertise it in a few places and the those who have liked it have flocked to my door.
Now with the internet your exposure gets diluted by inferior product with a better writer and/or budget to place them ahead of you in search engines supposed natural listings.
The opnly reason I do it is because my competitors copy my products, and information and then hijack my intellectual property and sales because of it.
Get real unless you are selling
SEO services or written material this is a real waste of monetary and work hour resources for other businesses.
I really long for the days when Yahoo was a structured direcory you drilled down through and was not taking search results by keyword density.