The one time I respond to a survey (I'm in Winnipeg) and it turns out to be scammers! (From what others are saying.) The info on this site is useful; now I know I'll probably get a follow-up call. I only answered the phone because I was waiting for a long-distance business call and that showed up on the screen - it wasn't till I hung up that I saw the number didn't show up on my phone, just "long distance." But thought I'd finally be nice to a survey worker (it's not a fun job; I've done it) and only realized something was up when it was too late: she'd said she was taking my number off the list immediately and she'd never call me for another survey, but then said I might win a prize. I started to ask her how the heck they'd contact me if I "won," since she said she's just said she was removing my number from their records right now, and she ended the call abruptly.

Have you contacted them?

On checking further, I found this 2010 decision by the CRTC against a company (Breathe E-Z Homes Ltd.) who used SPT to do surveys just like this (http://www.crtc.gc.ca/eng/archive/2010/2010-572.htm). They got people to agree (or not disagree) to a followup if they won a prize, but they sold that phone list to a company who then used it to target consumers (thus telemarketing, even to people on the DNC). They were fined the ridiculously low sum of $2,000, and either they or another company must have decided it's worth that little bit to try it again. (The website for SPT given in the footnotes no longer exists.)

Got a call Saturday night - I demanded that the caller identify herself by ID number and she refused.  Got angry when I persisted and eventually hung up on me!  Before hanging up she had a man come on the call.  My advice is take control of the conversation and:  1. clearly state to them that the conversation is being recorded and when they acknowledge that then 2.  state that you are registered with the government on the Do Not Call List and that the recording will be forwarded to the government along with their ID/name.  Be persistent about asking for their ID and tell them repeatedly that you want to be taken off their call list and eventually they will hang up on you

I just got this call too.  Did anything come from it?  I'm nervous now.