Do Rented Referrals compensate their monthly rent in standard membership mode?

I have rented 5 RR for the amount of 0.75 cents per month. All of them have an average of 5 to 6. But in a month they earn between 0.5 and 0.6 cents, which means a loss of 0.15 to 0.25 cents a month. What can be done to prevent this loss or is this loss normal ?

with thanks