I have given customers discounts because they wrote great docs, prepared for meetings, didn't mess around with paying, etc. And I tell them, I am giving you a d

I have given customers discounts because they wrote great docs, prepared for meetings, didn't mess around with paying, etc. And I tell them, I am giving you a discount of xyz because of zzz. Half the time they denied the discount but were thankful that I recognized their professionalism. Problem customers just aren't worth it unless that is all you have.