The reward is around 8$, it means what you earn 3$ every 5$ you spend, monthly.
if you spend 5000$, you earn 3000$ monthly, it sounds so bad?

is more than 50% ROI/month.. damn, i would pay to find some other project with this nice rewards
But that only counts if all factors remain the same. If the ROI is high the MN count will increase and the average ROI might go down.