I agree, I'd actually like to be able to resend the reminder to all who have not yet opened it or responded as often as I want. and possibly change the subject line each time.
I also want to be able to email a link to the survey AND send the survey by email through Hubspot (not either or).
As a user I want to be able to make any survey, then manage it's distribution via email or link, while tracking responses in hubspot so that I can get the most possible responses and insights.