A friend of mine was just able to do an ampario survey - it seems that if you don't have a "failed/open" survey status (when you click "Support" in the offers list), then it'll load properly (asking for your demographics, etc.).
BUT - if you've already tried an ampario survey (i.e. filled out the demographics, but likely weren't able to qualify for completing a survey), it seems the page never freakin' loads again.
If anyone knows how to clear your failed status out so it'll start again and ask for your demographics, that'd likely solve everyone's issue.
I wrote to ampario and trialplay days ago and still haven't had any decent reply from either of them.