The biggest problem is when someone comes and takes your software and doesn't do anything except sell it online for half the cost. This happened to me a number of years ago. They didn't do a better job or offer a better product. They didn't compete on functionality or user experience. They sold my unmodified, identical binaries (at a lower cost) as if they were an authorized reseller and kept all the money for themselves. I fail to see how this individual was deserving of the pure profit they made from my hard work.