Seems like they want to cover ground by buying every single startup that is successful and remotely related to social networking. This is where the startup economy falls and monopolies go bad.
Battery suck on Waze for frivolous reasons is massive. No one uses it for much else than cop tracking.... sometimes to send out directions to friends and groups, but that is also something that Google could do when that day comes around when they get their glass studded head out of their nether-regions.