I came to know from my friends that when you contineously use google apps like google map, google books etc. in play store an app from google called google opinion rewards will give you some credits when you give your opinions towards your recent activities. So when I installed the application for the 1st time in my phone a survey suddenly came and I was happy but when I gave my opinios it didnot give me any rewards by telling me it was your trial survey and you will get an another survey soon. I got another survey after around 15 days and after giving my opinion I got 10 Rupees. After this survey I did not get any survey for 1 months you can check my reward history in the bottom image. I use google maps minimum thrice in a week but I didnot get any surveys for one month. After one month I got another survey and I got 10 rupees. So I got only 20 Rupees in 2.5 months. Another disadvantages in this app that you can only spend your rewards in google playstore. I will appreciate with this app when it will give more surveys like 3 to 4 surveys in a week. If you have faced such types of problems in your google opinions rewards then let me know in the comment section below because I want to know is this is the problem of all or me alone!