You know how they say that different celebrities and stars spend a lot of money for managers and advertising? That is definitely true but I would like to point your direction to something else. When someone is already famous, his or her fans usually do everything they can to promote their idol. They are not paid for this, yet they work even better than their managers. They tell about those stars their friends, parents, etc. They create topics on online forums and other websites to show their commitment to a given idol. This way stars are able to get advertising for free. The same goes with some products. For example I have come across a website presenting different supplements. There are pictures of those products, descriptions as well as information how to take them. You can also find comments from people who have already used them. They are very helpful as you know that they are true. Sometimes those opinions that you can read on the official website of a producer might be fake. Here you have a guarantee that they are made by ordinary users. I have even bought some supplements that I have chosen after reading the info on this website.