There is one app Name Baymack in which you will get 50rs amazon gv by just watching 30sec video
1)Download Baymack app
2)Register using refferal you will get 500 credits(without refferal you will not get any credits)
3)watch 30 sec video for each 30 sec video you will get 8 credits
4) Minimum redemption for 50rs Amazon GV is 1050 credits.
You will get 500 credit using refferal so you have to only collect 550 credits