I am new to this but reading alot of documentation.
Our business provide services so customer who avail services can pay recurring monthly or yearly .If they pay yearly they get 10% discount. We charge according to no. of login and most of the time they start with less user and after couple of months they increase login and amount change .So want to know still i can use ARB or I need to use CIM. I was also reading recurring billing also possible with DPM with some settings in control panel? What should I go with?