Hmm, well I guess I'll have to reduce considerably my 1-in-a-million guess.

Maybe the 6-digit portion isn't that random? I do know that when I requested 4 new OP numbers recently (for employees under RewardOne) the numbers were like this:
JQ501689
JQ501690
JQ501691
JQ501692

On the other hand, my OP number (from Eastern Airlines days) has the year in the 6-digit portion, i.e. JQ661187-- which I always figured wasn't a coincidence.

Anyone else see any "logic" in their OP number that would lead you to believe the numeric portion isn't random?