Thanks for stressing this out, most of the people discussing if this is an abuse or not forget about the fact, that freebitco.in gives you the money for free. They do this to keep a single user at their site and make him log in a few times per day. Chances are very high that the user instantly gambles with his free money and loses it, leading to the fact that freebitco.in doesn't really lose a significant amount of money with those free rolls. As soon as someone sees the free rolls as income and uses it in a way it wasn't meant to be its an abuse.