The number of visitors by day was becoming more than 1 million people, many buyers do not have ads will be easily exposed.
Comparison of major shopping malls and most effective advertising to a much lower fee, you can get.
A good payback, so you pay less money.
Because they can return on capital, your capital loss is small.
When you start selling professional knowledge and even without the initial investment costs and advertising can be sold.

the proceeds should be paid advertising.

It is recognition of items for sale arose when the judge, and consultations are available.