"just containing e-mail addresses?"
FWIW Diachenko said the data silo contained:
* hashtype (the way a password was presented: MD5/hash/plaintext etc)
* leak date (year)
* password (hashed, encrypted or plaintext, depending on the leak)
* email domain
* source of the leak (I was able to confirm a few of the most prominent ones: Adobe, Last.fm, Twitter, LinkedIn, Tumblr, VK and others).
C.