You can avoid most scams by practicing a little due dilligence before you join the Bounty Campaign and making sure the people behind the project are real. However even if you are very dilligent you will eventually come across people who are basically just dishonest and don't bother trying to hide their identity, like Dylan Sharkey and the other scumbags behind IUNGO. The best way to deal with those particular anal fistulas is never miss an opportunity to name and shame them, that way others can avoid any Bounty campaign these social parasites attach themselves to.