I have been spending couple of mins every time a popup shows up on my phone for a short survey. And its small but i have already earned around $10 by just filling up surveys which are not more than 4/5 questions.
Install the ios/android app
Login using your google profile
Link your paypal
Complete surveys whenever one pops up on your phone
Payout happens on every 2$ balance
https://surveys.google.com/google-opinion-rewards/
Its available in india as well: http://indianexpress.com/article/technology/social/google-opinion-rewards-app-extended-to-india-play-store-credit-heres-what-it-does-4673132/
Give it a try and let me know if it works for you as well.