How do you term a signature campaign being good? is it because they pay in Bitcoins or ETH direct ? There are a lot of signature campaign in the bounty section that if you do proper checks, you can land yourself in one that will pay you in tokens which can later turn into an altcoins that will be better than those paying in Bitcoins or ETH.
Sorry for the question, but what if however those altcoins turn out to be completely useless? Will that mean you just wasted your efforts or do they usually always start with a price point?
It's your risk when you joined an altcoins campaign/bounty. We never know is the project or ICO will success or not, if it success you will get the altcoins in the end of the ICO and you can exchange it into ETH/BTC on exchanges but if the ICO failed, all your efforts is become useless and wasted.