And why not? If there is nothing going on,players would complain Blizzard doesn't care about the community. If they show they are still willing to put time,effort and money into projects for the community,in which the community will decide and vote on stuff,players would still complain.
This will have zero impact on WoD's development,as this is just Blizzard's side project to further connect existing players to WoW as well as bring new players in.
Exactly. The bikes will be free for the winning faction. Except for potential new players,Blizzard has no real gain from this.