Is that the point? People want to know the source. I have rights under the GDPR that companies should be treating my data securely. I want to know who was compromised.
This particular dataset appears to have been collected by malware. So it wasn't a breached company, it was malware on some machine that impacted users used that logged usernames/passwords.
I think the same malware that had breached my data awhile ago "Polish Credentials" is apart of this because the same old user:pass pairs so maybe its a bunch of data from multiple breaches if you were in the polish breach it dumped your google saved passwords so that would be whats affected