Lesson learned. Do NOT try to stop "You have a survey" e-mails. I used to keep a bunch in my In Box in case I couldn't find surveys other ways- clicking on one occasionally brought up another one. The new dashboard, though, has been great for finding surveys.
So...I tried to Unsubscribe from the e-mails. It brought me to a screen asking why but none of the listed reasons fit. I closed it down without proceeding. Next time I got onto e-Rewards it told me I'd cancelled my account.

I had to go through the usual e-mail ticket process and be patient but my account was just restored. All the points are there. too.
And now I plan to put in an AutoFilter in my e-mail account to divert the Survey e-mails instead!