Twitter’s two of the early investors Fred Wilson of Union Square Ventures and Bijan Sabet of Spark Capital are leaving Twitter’s board of directors. This is the latest shake-up in the long list of shake-ups at the San Francisco-based company. Fortune’s Dan Primack in a tweet postulates that “Twitter board shakeup reflected in who was offered cash-out on last VC round.” Twitter recently raised a whopping $ 800 million from a variety of investors including DST Capital, and is now valued at over $ 8.4 billion.
