I think this song is not just divisive but it's OVER THE TOP EXTRA divisive. It can appeal to a wide variety of people and specially fan of genres of music under-represented in the contest and those people are particularly supportive to these genres. So people are more inclined to vote for that song cause it will look like "once in a while" and you don't want to miss the opportunity to vote for a kind of music you won't see until many years.
also, It is for sure creating a "feeling" a "reaction", there's no middle ground : you hate it or you love it, and love means votes. You only vote for a song that you love, you don't vote for songs that you simply like. And as you may know, the televote is only a "love vote" you can't crash an entry you don't like you can only support the ones you like.
So I don't specially think it will be first televote but I can see it and others too having a strong support from the televote from the arguments above and we could find others I guess