This subject is familiar to many solo entrepreneurs. Yet you will rarely see it discussed openly. It is a side effect of selling a good product. Sort of a "bonus" that comes with being successful.
Once in a while I get an e-mail that reads along these lines:
"Send me your product first. If satisfied, will pay. Too many scams out there. Prove that you're not."
"Help me make it happen for me, then I will send you my payment."
or better yet
"I am a poor man from South Africa. Praying to God that you will send me ALL of your products for free. I want you to be my guide, my coach, my mentor... and have it in your heart not to charge me until I start making money."
At first, I thought, what heck - his $40 will not make me any richer, and would send person my products free of charge. Especially since these e-books didn't cost anything to deliver.
But after a while, as my online business grew and traffic to my web sites increased, I started getting similar e-mails about once a week. People would ask me to send them my products for free, and when they start making money on Internet, they would send me their payment.