Can’t get credits now – WhatsCall-Calling App+Recorder Review

I used to get credits from the surveys etc but now I don’t see the option to get more credits, now I have spin the wheel, see ad worth 30 points and invite friends 1000 credits. What happened to the earn from 30 or so to thousands of credits option?
Review by sib003 on WhatsCall-Calling App+Recorder.