Add dynamic variable to the href of a link in an email

[cihanbilir]

The automated immediate emails we send to our subscribers have a link to a survey (Google Form for screening to be specific). In the URL of that link, I want to be able to add the email address of the subscriber as a request parameter so the subscriber will find it pre-filled in the survey form. This would save them from typing in to answer their email address they just did in the landing page one more time. I’m cool with adding it manually to the target address as “?key=${contact.Email[0]}”, which I did, but I found it untouched in the test emails I sent. Consider this as a feature request to consider href’s as areas of sources that variables can be injected. Thanks!