Forget I asked - I simply cannot imagine going off to learn enough in the grey-area to make it worthwhile. I will write decent software for a niche here or there and see where we go.
You don't even have to do that. You can buy the e-book with distribution rights and make your own website to sell it, advertise on adwords, and away you go. My dad did it, he was getting an extra $100 a month with no time involvement at all. Once he got the paypal email his autoresponder would reply with the ebook. The only thing he had to do was once a week or once a month check his adwords account.
