Many online businesses opportunity sites never deliver the services they promised. Here's a tip: never give your credit card simply to prove that you are over 18. You could end up paying money without your consent. Also you should avoid buying into "bargain" packages stuffed with hidden fees or forced continuity programs. The good news is that there are some legitimate marketers whose main business is teaching others. But if you do your research, you will find pages and pages of independent information regarding that person.