Why communities leak your email (and how to stop)
Community platforms often share member lists with partners or get breached by attackers. The humble forum email is a primary ingredient in credential-stuffing lists. By using an address that self-destructs, a breach finds an empty shell instead of a key to your identity.
Email marketers also buy community-participation lists to build "engaged user" profiles. An anonymous inbox ensures the engagement never attaches to a real identity.