HP License credits are used much like the DynoJet Power Vision License.
When an RTD, or MPVI is being used on more than one machine, the second, or the additional, machine is required to purchase additional credits to utilize that device.
Each Polaris application, Pro XP - Turbo R - Pro S or Pro R, would require (2) total credits.

Example:
Buddy with Machine #1: purchased WSRD Stock Injector Package and RTD Flash Utility and utilizes it on his 2022 Polaris RZR Turbo R.
Buddy with Machine #2: purchased WSRD FURY Stock Injector ECU Flash - 91 octane for his 2024 Polaris Pro R and wants to use his buddies RTD Flash Utility to flash over to the WSRD Stock Injector - E85 tune. Machine #2 will be required to purchase those before-mentioned (2) HPT credits.