Maybe Twitter/Yahoo should team up or Snapchat. Get these teens some ads. Yahoo's mobile strategy is a struggle, maybe some partnerships are in order. I honestly believe Mayer could do it but since none of their apps are FB/Instagram/WhatsApp nor do they have the traction as these juggernauts, I'd suggest a partnership. Come on Yahoo. Find a niche, make some money. Losing these talented people. Maybe it's because the…
It's just really, really hard to buy something "hot" without killing it (by external reputation/customer satisfaction or internal employee exodus)
Off the top of my head I can only think of two that worked (Instagram, WhatsApp) and Facebook deserves huge credit for that.
I don't think my own employer (Nokia), even in its heyday, ever successfully acquired and integrated a company.