Tell your prospects that your freebie won't be free for long and they will have to pay for it eventually.

For example,

• Your friends are advising you to quit giving it away for free and start selling it because it's too valuable.
• You are going to eventually add the product as a bonus to another one of your products that you sell.
• You are planning on selling the private label rights to just one person and they are planning on charging for it.
• You are going to add more content, benefits or features to the product and sell it in your membership web site.