Instagram: Emily White (Business Lead)
Why this is a big quit:
Emily White was a Facebook executive put in charge of Instagram advertising after the $1B acquisition. She just left to become COO at Snapchat . An aggressive talent grab from Snapchat to make her the CEO’s right-hand and may spur further industry disruption from this social photography startup
Why it’s not as big as our Top 10:
Although Snapchat is becoming more popular, it is not yet a direct competitor of Instagram. Also, the Business Lead position she left at Instagram is not prominent enough to have substantial impact. Lastly, Snapchat got caught with some very leaky code where the phone numbers of all users could be (and a portion was) published. So any bonus effect from White will be blurry for a while.