Honestly, I think WGT is pulling a scam on us. They're not verifying if these survey's actually pay out.
WGTChampion:
Have you contacted the company that placed these offers? If you are playing only on your iPad you will need to contact TrialPay by selecting the "?" on the offers page.
_CHAMPION
Also, many of the surveys never seem to end...eventually you get to a page where there is no more Continue button and you're stuck. Your only option is to exit out, and you'll get a message "Exit and you lose your credits"...but there is no other option.
It really irks me to spend so much time doing these survey's only to get screwed.