here is my reply from QR support when I mentioned the problem with SI Survey's not crediting:
"Overall SI router is only good in crediting if browsers are rotated often.
Did you try using another browser to see if that works?
Also it is very important if you don't qualify not to click on the "want to
try another survey" button and to start by clicking on our link again to
attempt second time. It is one of the most problematic survey routers."
and a follow up after I asked if this was a global problem as other people reported similar issues :
"I am seeing SI credits coming in so I am not seeing any issues from our
end. Did you try Google Chrome?"
So far the consistent SI Survey router that credits is "SI Survey 2". That always credits for me even when the other routers were not in the past 2 weeks. I use Firefox only because when I use IE7 NOTHING credits, at all. Just my experience. Strangely enough, I also found that my work computer is better than my home computer for surveys - so I wind up staying after hours to go through the surveys. (there are numerous differences between the two so I can't identify what makes the work one better, so I can't help there)