sdevaney writes: "I have an open source project released under the GPL license. The project is an RPG for the Android OS. This project is freely available at no cost to anyone. I now have a problem where people are taking my project, sticking advertisements on it, and trying to profit from it. No modifications are done or if there are modifications they are not released to the public. How can I protect my project from these types of situations? Should I use a different open source license, or is this an issue with all open source licenses? Are there any other steps I should take to protect my project?"