Why Most Bloggers Fail To Get Significant Success?

More than 90% of new blogs fail to get significant success in terms of traffic and monetization . The dilemma is that its very difficult to focus on writing great quality content for blog when you have to make time for marketing and promotion of blog . Currently i am working on a  project that aims to tackle this problem. Please read the following questions and answer them along with any suggestions . This questionnaire is part of market research and to understand the views of blog authors .

1. How long have you been blogging ?
2. Average hours per week you spend blogging /research ?
3. If you monetize your blog, how much do you make ?
4. How much visitors do you get to your blog ?

Looking forward to receiving your answers in comments  . Thank you.