There used to be four distinct reasons that people would ask me to help them with blogging.
1- A person had an idea or a story and wanted to be heard. It isn’t always about money or business – see the political blogger, and the personal blog.
2- A person wanted to make extra money blogging. This doesn’t happen as much, at least not on a full-time income level. But to some, even $5 – 20 a day is a huge help.
3- A person, (especially an entrepreneur) or a larger company wanted more visibility. If you want to be seen, and to have multiple opportunities to be seen again, you blog, and you keep blogging.
4- Better search engine results or traffic. I would get a letter from someone who had X amount of traffic that would bring them Y conversions. And all they wanted was more of each.