Nice find! It strikes me that CRH uses the same reward system as gambling does- intermittent, unpredictable rewards that positively reinforce the behavior. If I remember correctly, it is one of the most powerful reward systems. Guess that is what keeps me hunting right now. Never know what will be in the next box...
Dingdingding. Intermittent reinforcement is powerful enough that knowing about it and understanding it doesn't give you any immunity. It makes you do the behavior more frequently, and it makes it harder to quit (slow extinction).
I'm sure this would be hard to get around, have you thought about other means of getting silver? > ie: yard sales, auctions, thrift stores...?
My luck changed big time since I posted this thread. Over 10 ounces of silver in just over a week all CRH. I have tried thrift stores to no avail on the 92.5 silver. My area is pretty picked. Yard sales are tough but I have only tried a few. Auctions at my coin club are fun but I usually just get numismatic rather than Bullion coins. I do have a dealer that sells me 90% junk for under spot.