Jonathan Vanian / CNBC:Snap Q2: revenue up 9% YoY to $1.34B, vs. $1.35B est., 469M global DAUs, vs. 467M est., and global ARPU of $2.87, vs. $2.90 est.; SNAP drops ~15% after hours — Snap shares tanked 15% Tuesday when it reported second-quarter earnings in which global average revenue per user missed expectations.