Fitbit users: better one-up your friends in challenges while you still can. “Fitbit found that these select features had a limited number of active users compared to other offerings, but are unable to confirm specific numbers at this time,” Nicol Addison, head of communications at Fitbit and Nest, told The Verge in an email. “Fitbit found that these select features had a limited number of active users compared to other offerings, but are unable to confirm specific numbers at this time,” Nicol Addison, head of communications at Fitbit and Nest, told The Verge in an email