Can user account information really be called "logs?" This article mislead me into thinking PureVPN kept activity logs, but the end of the article makes it sound like they just store an email address. Did I misread?
Google discloses that the victims account was accessed by a set of IPs. Those IPs are known to belong to PureVPN. A list of people connecting to those IPs as clients is requested by the FBI. The connection logs validate their suspicions.
Also login time, connecting IP and logout time. So no traffic is stored, just that you logged in and were connected for X amount of time.