Yeah, man! Trust only reputed managers and good companies. Do the research yourself and only put in work for campaigns that looks legitimate.
Yes you are correct, i have been advised all my friends to only focused on the projects which are run by respected bounty managers most specially the higher ranks, to be specific the legendary members. Of course, do some study which are essential part in promoting a business. There are so many good companies out there, we just need to be discovered by means of studying all the projects posted in the thread.
Have a great day