It's not a Nickelodeon show, it was made by Maya Digital Studios and gave it to Nick as exclusive kids broadcaster of the show.
Nickelodeon shows are Spongebob, Fairly Odd Parents, Teenage Mutant Ninja Turtles, The Loud House etc. many of these shows have never been aired in India. They only release new NICK JR. content like Dora, Rusty Rivets, Nella the Princess Knight, Alvin and the Chipmunks, all of these are from Nickelodeon.
They did show Spongebob and TMNT but only the first season. Spongebob is on Season 11 and TMNT is on Season 5.
Fairly Odd Parents air on literally every single Nickelodeon channel in the world except India.
Maybe it's popular, because it's literally the
only show they air all day? As well as Ninja Hattori?
If they did this in 2007, they would have never bothered to try out Ninja Hattori and see how popular its become. If they kept a limit for Motu Patlu like about 90 mins a day and made way for other shows then it wouldn't be much of a problem. But it is lacking variety.
Look at CN India, they are airing the latest shows, Uncle Grandpa, Steven Universe, Mighty Magiswords. What does Nick have? Nothing.
It would be better if they showed it on Sonic as it is not international channel.