There are mainly 7. I got these from a free e-book I downloaded some time ago written by Ann Sieg.
No. 1 Everyone is your prospect
No. 2 This really isn't sales. We just share products with people.
No. 3 Anyone can do this!
No. 4 We'll build your business for you.
No. 5 We have the best product ever!
No. 6 You just don't have enough belief!
No. 7 The proven system
Having said that, I know and have friends who have made it at Network Marketing, but it 's not as easy as sponsors picture it.
There are good MLM companies with good compensation plans and with the right tools, strategies and effort, there is potential.