Wunderkind is a global performance marketing solution that helps brands acquire new customers at scale and keep them loyal for life. Unlock a new revenue channel today. Wunderkind is a leading performance marketing engine that delivers tailored experie... Wunderkind has a dedicated browser-based opt-out page for its Identity and Performance Advertising platforms; the opt-out is stored as a cookie, so you must redo it if you clear cookies or switch browsers/devices. For deletion, access, or correction of personal data, email privacyrequests@wunderkind.co (or use their data request page); they report a median 10-day response, and opt-out links are honored in real time. A toll-free privacy line is also listed: (888) 594-0111.