Email Address Protection?

I read https://www.nytimes.com/2023/01/25/technology/personaltech/email-address-digital-tracking.html, which in part says

>For sites using the UID 2.0 framework for ad targeting, you can opt out by entering your email address at https://transparentadvertising.org.

Would only idiots volunteer their addy here, or is it actually legit? 🤷‍♀️

Bonus Question: Anyone here have opinions on https://relay.firefox.com/ ? 🤷‍♀️

#EmailAddressProtection #FirefoxRelay