All it takes is to duplicate your success. We Have Found Useful. If it's a business opportunity don't spend a lot up front. In fact - Don't spend too much money period. You usually can't buy success, the business should help pay for itself very quickly.
People go to the Internet for free Information.
Offer them useful information for free. This builds trust and helps establish your expertise. Everyone is an expert at something. The Internet can be impersonal - you must establish a relationship with your niche market. I'm not talking about SPAM, that doesn't work.