from my personal experience it is very difficult to distinguish between good and not projects,
especially with the case of Titanium and Miracle Tele, I got a scam there, even though if I look at the project it is very good
Scammers these days are always a step ahead of the bounty participants and also the scam projects are trying very hard to look like legitimate projects and they even have purchased the accounts of legit people on LinkedIn too and also many other practices that make them look legitimate. These days the eating websites are also not doing their job to curb out the scam projects from being listed on the website. The higher the developers pay the better ratings they get in return, this agenda is really hurting the community and should be stopped.