The phrase means that you are going to give what you sold, and, because your no-customers will be happy with you, they will buy from you and become your customers. If the whole idea glistens so much, it may be because it is as consistent as water.
The concept that backs the tip is that the more you give away, the more your receive. The true reason for which most people accept it without even thinking is that they have been brought up to believe it. It is only a new version of the old Christian principle: Give, and it will be given to you , forgive and you will be forgiven. It is used to conquer children and mobs. And customers.
Look at what YOU do as a customer. You take the free product and go. If it is all what you needed, or desired, you will not buy anything, even if the seller is the generosity itself.
If you need something else, you are going to test the free product and make your mind according to the results. If you are pleased with the gift and were looking for the $10 product the same seller offers: you will buy from him. If you are pleased with the gift and the same seller gives away the $10 product you were looking for, you will take it for free. You are not going to send a check along with your thank-you postcard. His benefit=0. In fact, it is less than 0, because he has to pay for the gift, even if it takes only bandwidth.
Do the math from the seller's point of view. You have 10 subscribers to whom you try to sell a $10 product. So far, you have failed. (If you have been successful, you would not give in the moving down the free line stuff!) Y ou shout everywhere: my $10 product is now free. All of a sudden, your former 10 subscribers "buy" it, and 10 new subscribers are asking for it as well. Now, you have got a list of 20 subscribers.
Yeah! Free stuff helps to build the list. What a piece of news!
The rub is you have no longer a $10 product to lead your subscribers inside your funnel... and still no customers.
What to do? Hey dude, move down the free line.