It is really hard to detect scammed bounty campaign. After completing all the requirements to be able to get accepted in a bounty campaign, spending much time to participate in forums and not to mention carrying their banners, completing all the tasks and reports then all of a sudden you will just find out that you have been scammed already. luckily I am not the only one but to think all participants did the same efforts as well as you did. But it is really happening, lesson learned and could be just charge it to experience and move on. If we could only find out at early stage if we were in to scam or a legit bounty campaign. Who would really know anyway?
I don't think anyone knows about a scam project, because there are so many projects that look good but they are scams. therefore, a scam project is a risk for bounty hunters and is very difficult to avoid.
when compared to past years, there are currently more projects that are scam, but there are still many good projects although it is very difficult to find them.