If I have multi-user Abra, do I have to buy multiple licenses for stand-alone R&R?
No. Buy however many R&R licensees you think you will need to use at any time. R&R licenses can be loaded and shared on a network just like Abra (and many other programs). Only the module to create reports — Report Designer — is controlled. You can use the R&R tools to deploy reports with no restrictions, so everyone in your organization can run the R&R reports you have created.