The primary use of this data is to automate login attempts on other services (banking, social media, e-commerce) where users might have reused the passwords found in the list.
Ensure you use a password manager and enable Two-Factor Authentication (2FA) on all sensitive accounts to mitigate the risk of credential stuffing. MEGA Transparency Report
You can report the specific MEGA link to their abuse department at abuse@mega.io to have the content disabled.