You're not required to "share it" at Nebula - https://nebula.org/technology/ https://nebula.org/technology/ "Our anonymous sequencing service enables our users

You're not required to "share it" at Nebula - https://nebula.org/technology/ https://nebula.org/technology/ "Our anonymous sequencing service enables our users to sign up, submit their samples, and receive their genetic reports without ever personally identifying themselves."