Oniz offer high & unrealistic referral commission on their scheme. That's the main reason why you have received this mail. They randomly collect mail for spamming. It has been done by team or some ponzi promoters.
Seems they will pay up to 18% interest per month which is high return. Only lazy and greedy people would trust on them. We have seen it previously what happened with ponzi scheme. Eventually they skipped with investors fund.
So guys please stay away from that kind of greedy and unrealistic offer and save your money.
Supported flag and tagged as well.
Edit:
~Snip~
Thanks for point my mistakes, post has been edited and I will take care in future.