Advertising

If it is against the law to have false advertising for a product or service, then how come so many products and services are not advertised as they really are? An example of this is freecreditreport.com. This service is not actually free. In the commercials and everything they advertise how free it is but yet if you go to the website it is not free. Most credit score companies are guilty of this. Another example of this is the commercials and paid programs that you see that advertise getting rich fast. They show that if you purchase these homes for really cheap you can sell them and make back triple what you paid for. The reality of these are that you can't actually make as much money as they say.
Another product that has false advertising is diet pills. They advertise that if you just take the pill you can still eat as much as you want but you will not gain weight. This again is a lie. You can not just take the pills and lose wieght, you have to exercise as well. Also when you quit taking the pills you gain weight faster than before.
Also a lot of products that are sold on tv, do not actually work. If a producct does not work like it is supposed to, it shouldn't be able to be sold until the company can get it to work properly. Some examples of these products are cleaning supplies. They advertise these cleaning supplies that are only sold on tv, as being like miracle workers, but yet when you try using it at home, it does not work that great at all. I know it is marketing, and how they sell the product, but shouldn't the product live up to its advertising?
This is something I have always wondered about advertising, how do so many companies get away with false advertising, when it is against the law?