I found a new crypto-currecny where they give 100 free coins for whoever sign up at the first phase of introduction. I am not really sure whether it is a way to collect email addresses. But if it is real then you all can earn solid amount for free just by signing up. Who knows it might works and just sign up with your backup email address . So it wont hard anyone . If it works . then you wont a jackpot . if it is not then who cares. it took just 1 minute of your life.
FYI
When i join 100 coins were worth 29$. now its 83$ after a week . "It says by the site"
link - https://www.vitrocoin.net/