Hmm, I've followed this thread since the beginning and I only see the question raised a couple times and no answer. I see that a different expiration question (when do points expire) has been raised dozens of times. Could you please enlighten me on what I'm missing?

I've been doing the surveys for 11 months now, never had this issue before. Started a month ago and still and continuing. I have only been take 1 survey out of 20+ in the last month that was not "expired" the minute it arrives in my inbox.