Re: WTF is an App doing quering network time?
In a former life, working on an app that displayed time-dependent data, we found that some very negligible quantity of people had devices with the wrong time, most likely because they have their iPad, iPod Touch or iPhone without an international SIM, then when they land they adjust the time to wherever they are, not realising that it's much easier just to adjust the time zone. They've had to disable automatic time setting to get to that option. They end up with a device that says the same time on it as the clock on the wall so you try telling them they've done it incorrectly.
I guess somebody at SnapChat decided they don't trust users not to have disabled the built-in OS time synchronisation.