Why was access revoked on Ashley Madison?

Access was revoked on the Ashley Madison website during a major security breach that occurred in 2015. During this incident, a group calling itself "The Impact Team" hacked into Ashley Madison's database and obtained sensitive user information including names, email addresses, and transaction records. This data was later released publicly, exposing the identities of users on the platform, which promoted extramarital affairs. The revocation of access served as an immediate response to secure the site, protect users to some degree after their information had been compromised, and to begin the process of investigating and remedying the security failures that had led to one of the most notorious cyber-attacks in recent history.