If you are remotely serious, your post serves as evidence that it is a bad system.
Lol...I was being factious. I cannot imagine what benefit there is to what card you end up on. Each has several possible, perceived benefits and detriments. These are very personal and really should have no bearing on the simple task of card building. But, membership has its privileges. I have seen no better arbitrary solutions offered here. From an organizing/TD perspective, PDGA number is easy to use, readily available and self explanatory and fair.
Is sending out older age protected cards, on early tee times unfair?