Surveys are hit & miss: you can go two or three days and get one or two, and then hit four on one day. But if you keep at it, you'll get the hang of them. And yes, sometimes you have to "tailor" your responses, so to speak. :-) Last night a lot of surveys were turning up as closed, filled, etc. That will happen too, try to be patient. Also, weekdays are more popular than weekends for catching surveys.
And as far as the recent increase in carousel views, that was a Live Gamer move where WGT had no control. However, there are a couple of tricks you can do there to increase your views.