Farnamstreetblog is about discussing, sort of, literature and business, etc. His posts, without actually counting words, are generally far beyond 500 words and that site gets plenty of followers.
Like WIA said, write for those of your audience that are interested. Write what you need to write to get your point across. That being said, be able to edit and remove the fluff from longer posts. If it is good people will read it.
Like WIA said, write for those of your audience that are interested. Write what you need to write to get your point across. That being said, be able to edit and remove the fluff from longer posts. If it is good people will read it.