There are many factors.
The cities and towns like Mumbai, delhi, Banglore are not voting enough. People are watching but not voting.
Also the target audience.....Mostly its the young folks who form the chunk of voters.
Dont forget....teenagers extensively vote for teen idols. thats a living proof even in American idol.
Like they have a crush on them, and they vote for factors such as cuteness, sweetness.
Also some people do revenge voting, when they constantly hear judges saying bad about contestant, they purposely vote hard.
Its also a fact that some people hire folks to vote for their fav contestant all night.😲
And also I have noticed that north east has always voted extensively, for their own reigonal people, its a trend.
And sony wont eliminate thse bad singers because they pour in money thru smses, so they wiill earn as much as they want and for that the good singers suffer,😭