[skibbityboop]

> If you have a whole database of them, the trick is to try one code with a thousand cards

That still sounds like a crapshoot... Of those 1,000 cards, there might be 14 that have 982 as CSV, 9 that have 307, and none with 118. In other words, there's no guarantee whatsoever that any given CSV will be used in a batch of 1,000 or even 10,000 cards.

[jjav]

Of course there is no guarantee, but statistically if you have 1/1000 probability of success and you try a 1000 times, that's not bad.