I guess this opens up a new strategy. If it's early in a survivor and you know a song is going to be eliminated by a wide margin (Eternal Rain in this case) one could start voting for a song like Sun for future tiebreaker considerations
If you want to waste your votes this way, go ahead. It's quite unsporting to do so though, if I'm allowed to say that.
You're allowed to say what you like.
I play survivors as they were originally intended...to try to have my favorite song (songs) survive for as long as they can. Hence the name of the game. Otherwise.... we're just voting our least favorite song over and over and over.
However in this case, had I voted for Sun instead of Eternal Rain in round 1, it still would have won the tiebreaker with Drowning in the Flood, and I suspect if 0-1 people are playing with strategy, it will have no affect on the final rankings.