Then they wonder why they don't get sales.
The real reason why you don't get sales is because you've come fake. People can indicate this from a mile a way.
If you just some guy on the net promoting a product your probably not going to get any sales.
If you remain who you are and grow towards those who are already around you and keep doing what you've always done best, then you will get sales as you refer the products that you promote.
Note: refer, not sell!
Just be you, and your money will rise!