I don't know any more than what is published online re the BSF. BSF cards were stigmatized at first...some didn't/don't believe they are real. They also changed the landscape of e98 collecting forever as there are now more ultra high grade examples than not.
Many of these cards have been reholdered...or have been since graded without the BSF moniker as I believe people are trying to distance their cards from the find.
Additionally I believe family members of the find likely still hold numerous more yet to be holdered examples.
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