If your audience is going to be a group of highly intellectual book readers, then a good command of vocabulary might be necessary. If, however, you are speaking to teenagers or college graduates, your vocabulary does not have to be Shakespearean, but your message MUST be clear and easy to understand. Keep a mental note that most people who go online have an 8th grade reading comprehension level. If they want a book that discusses the dancing ritual of a chimpanzee, do your research and supply a pamphlet or booklet on the subject. The only real investment is time.
Some projects take months to produce and others only hours.
Those are the 3 steps to internet riches, although technically, there should really be four, and that fourth one would be. You have created your service, product or information and dedicated a large portion of your life to it. Not only is it quality, but you deserve to BE PAID for it.