Tens of thousands of pictures, user chats and private messages are due to be leaked in the next data dump of alleged Ashley Madison clients.
he hackers behind the breach, who call themselves The Impact Team, have been in contact with the website Motherboard via email and revealed their reasons for the hack.
They claim to have further details of alleged subscribers to the infidelity website.
Asked what other information they had obtained from Ashley Madison owners, Avid Life Media, they replied: "[We have] 300GB of employee emails and docs from internal network. Tens of thousands of Ashley Madison user pictures. Some Ashley Madison user chats and messages. One-in-three pictures are d**k pictures and we won't dump. Not dumping most employee emails either. Maybe other executives."
When asked about their motivations for the hack, they said: "We were in Avid Life Media a long time to understand and get everything. Finally we watched Ashley Madison sign-ups growing. Everyone is saying '37 million! Blackmail users!' We didn't blackmail users… but any hacking team could have. We did it to stop the next 60 million."
Meanwhile, a former employee of the international adultery website previously claimed in court papers that she was asked to create hundreds of fake profiles of "alluring females" in order to attract male subscribers.
Doriana Silva claimed she had incurred Repetitive Strain Injury (RSI) after being made to input as many as 1,000 fake female members, in a 2012 lawsuit against Ashley Madison.
Miss Silva launched the case in 2012 claiming €13m in damages. Avid Life counter- sued her, denying her claims but both sides agreed to drop their cases.
Meanwhile, increasing numbers of supposed members whose details have been published online by hackers say they have never even heard of Ashley Madison. Online security experts have suggested the addresses could have been bulk-bought from marketing companies.
INM technology expert, Adrian Weckler, stressed: "It's one of a number of allegations. There is no proof. However, I would say that anyone who did sign up to the site and hasn't been caught red-handed is going to deny it. It's just human nature, isn't it? But technically, yes, their email addresses could have been bulk bought by internet hackers."