I've had 75+ cars for a year now but Rewards says I only have 15

I have some uniques but most of them are the same crappy $5,000 Pinto.

Do duplicate cars not count towards your garage total for Rewards? My in-game stats are adjusted properly.

I do not have the answer to your specific question (credit for cars owned?) but - my rewards have been broken for quite awhile now - rewards CR has not shown up in game for, gosh, I cannot remember the last time… but like a lab rat I still logon and press the button every month!

That sucks, man. Sorry to hear it’s glitched for you too.