Sometimes NativeX does not work, however it does most of the time. I have earned a lot from them. I had a problem once when I did five offers(worth about 90 plats) straight that never give me my rewards. So then I emailed NativeX and waited. I waited for 3 more days and still nothing. I showed them a lot of screenshots, proving that I really had finished the offers. I send an email to Spacetime Support instead, and immediately sent me my rewards. IMO, some employees of NativeX are just lazy to take an action.