Bullshit. That's not for the 'whitehat' to determine.
"We found records containing email addresses in 10,560 tables across 7,403 of the 24,664 websites (30%)"
You can't know that without pulling the data.
I mentioned this in another comment, but for completeness: we didn’t actually pull all the data. The number would likely look much worse if we had.
Why do you insist on other people following your personal preferences?