iOS and Android use the same POST

Native Unsubscribe screens POST /api/v1/unsubscribe. Same idempotent ok.

iOS and Android Account Unsubscribe call POST /api/v1/unsubscribe with a valid email. They do not open Safari for the form.

GET /api/v1/unsubscribe?q= lists these topics in-app. Deep links to /unsubscribe are reserved, not a talent username.