There are always going to be people with less than honest incentives regardless of where you go. Just be safe and do your research. You'll be fine.
Don't be fooled. We all know that scammers nowadays are everywhere so don't be a gullible. When you are going to join a campaign or some projects. You need to study and read a lot about that campaign. If its legitimate or not, if it's reliable or not. Be very careful in trusting. Because people would do everything just to make money.