Twitter just lost another key executive (TWTR)

Yet another key Twitter executive has left as the company struggles to make money and innovate its core product.
Twitter's vice president of global sales, Richard Alfonsi, announced on Friday that he is joining payments startup Stripe. Alfonsi worked at Twitter for four and a half years and was responsible for growing the company's ad business, according to his LinkedIn.
"We want to thank Richard for his dedication to Twitter and his many contributions over the past 4.5 years," a Twitter s