Okay, this is bizarre.
As mentioned, I've gotten a few email survey invites since this place seemed to have disappeared. Of course, I didn't take the bait. But I logged in on Sunday just to see if the site still existed. Apparently it does, but it still looks kind of a mess to me. I did notice the site said I had enough points to cash out for a $20 gift card, which was strange since I only had earned enough points for the $10 gift card I never received. And I certainly hadn't done any surveys for them since.
Anyway, gave a shot at redeeming, and lo and behold a $20 Tango gift card arrived this morning.
Not complaining. But I'm still more than hesitant to do any more surveys for them.