Good catch, re: email in the URL. I'm likely to the blame the sender of the email for including PII in the Google Analytics UTM parameters, which is is a clear violation of GA's terms and best practices [1]. If it's 80000hours.org that sent the email and created the tracking params, then the OP should contact them and hope that they remediate this.

[1] - https://support.google.com/analytics/answer/6366371?hl=en