Re: Interesting, but. . .
There are invalid email addresses in this list (I know because someone tried to tell me it was a scam site based on that fact), probably from people generating potential email addresses for company domains using common names etc and then they end up in a phishing attempts list or something. Details for the breach show that the data may have come from several sources.
There isn't any push to purchase anything, other than the recommendation that 1password is good because it uses an API to alert you if passwords you store in it are part of a breach. It's written by a totally different company (any company can hook their software into the data to check this).
I seriously did have someone tell me they're convinced this is a huge scam to harvest email addresses and passwords entered by people from the same source IP address (to link them together) which to be fair would be a brilliant one - spend years building a reputation and working for Microsoft etc to then use a fake massive email and password data breach to harvest thousands of peoples real details. I did point out (among other reasons) that why would you tell people their data had been breached and advise they change their password....