when the project was published by the campaign manager, I think it was through the review that the team manager did. but we must understand that the power of the bounty manager will not change the project that ends up being a scam.
most of the campaign managers have also informed in the thread that they are not part of the project developer. Whether it ends up being a scam or not, of course, is not the responsibility of the bounty manager.
looking for projects that have been escrowed with campaign funds may be the most sensible way to avoid scams. although that still does not eliminate the risk.