Any landlord offer your tenants rent coupons?

[Jimmy S.]

Any landlords give their tenants a coupon or voucher for a small discount $10 lets say, if they pay a certain amounts of months on time?

I was thinking of starting this and giving my tenants a $10 discount "coupon" on the rent if they pay 4 months in a row on time or is this a dumb idea? Least it gives then some incentive to try to pay on time...

Let me know your thoughts.