Why wouldn't members turn them in for meltdown? When one can't get $10 face for common strikes, why hang onto hundreds of them when the melt price is $11, or higher? Same thing happened with pre-1965 silver coins many years ago ... which is why you don't see them in circulation anymore.
"Bad money drives out the good money" ... and clad strikes will drive out the silver strikes.
The scrap dealers and local mom & pop coin shop owners and jewlery stores around the country who are sending this stuff off to the refineries by the barrel or bucket full are not going to take the time to record each strike whose centers have been punched out and thrown into the scrap silver heap.