Correct, Randolph stepped down as CEO in 1999—replaced by co-founder Reed Hastings—to turn to product development and departed the company all together in 2003.
Why? He didn't have the money to turn it into what he had hoped. He went on to continue in start ups. Looker Data Services, which was sold to Google for $2.6 billion was the latest.
The point of the thread was to show the connections in the family line and how they all ended up in positions influencing your mind - even Randolph's Looker Data Services does that.