This is incredibly important: (what sudzee is pointing out)
There are SNRs that have come in really odd packing patterns, as described over and over - the twomissing per brick, in CBN bands, although printed by BABN.
THEN, there are SNR's being found that are in the shrink wrapped bricks. Meaning, they are put in by the printer - for sure.
Now, since we already see that these kind of SNRs are surfacing, one must be cautious not to compare scarcity of one kind to another. If they are coming right from the printers, then the liklihood of "more" being found seems to be sensible.
How many-? Who knows.
How about the others? In the CBN style packing? Possibly an already exhausted supply, but again,we do not know for sure-- however the pattern was TWO notes per brick only.
The other ones, are being found in larger quantities -- although still rare as heck as any brick searcher knows,.... but they cannot be directly compared to those early found AOK, AOP, AOM ranges that came in the CBN banding. It is a whole different animal.
To restate, SNR's are very hard to find = true.
Depending on packing style, the contained replacements may be extreeeemly scarce, or could alternatively be replacements inserted by the printers, at a possibly higher frequency (although still very infrequent).