You can make huge by participating in the bounty campaigns. You will get rewarded with rewards in the form of tokens which you can further withdraw from your wallet. You get paid for the promotions you do for the different social campaigns that you enrol yourself in. So, your actual money is not used and you make money by just promoting and marketing about the ICO.
One of the best easiest and fastest way to earn money without any investing is through joining in bounty campaign. We all know that the more you have higher rank, the more you can make profit. You can also earn in faucets but it takes time to gain good profit.