They should be removed from the app store!
As many other users have reported, the app offers compensation for completing surveys but hardly ever follows through. After spending much time answering and completing surveys, when it is time to be paid, the message will appear that "the survey has closed" or you "don't qualify", despite answering all of their questions. They are scamming people into doing this free work. Customer service responds to inquiries by accusing people of responding too quickly or by saying that sometimes bad surveys "slip through".
Please don't let yourself be robbed of your valuable time and of earned monetary compensations! Try the many other survey apps that actually follow through!