yes it can be safe and can not, why is that? because it all depends on the manager who manages if he is honest, of course it is safe if not then the opposite
Manager has nothing to do with the campaign unless if they are part of the team but most of the time it is really been handled out by reputable bounty manager of this forum which we could say that
they are just handling out the campaign and has nothing to do with payments. Safety wont really be that guaranteed yet we know that projects could really not able to pay those
bounty hunters if they do really have that kind of intent in the first place.This is why its really suggested to make out some research first before making any step forward
or deal with bounties on which you could really have at least the chance on earning out of your effort and time spent on doing those bounty task.