Of course-- we have a dogfood instance of LaunchDarkly. We use LD as our plan permissioning system (the plans you see on our pricing page are managed by LD). We also use it for ops-- we migrated a key piece of our analytics infrastructure over to DynamoDB, for example, and controlled the rollout of that via a feature flag.

And of course, we'll launch new features behind a flag. I'll admit that we've had two or three occasions where we had to hit the kill switch after a deploy, so I'm rather glad we had a LaunchDarkly for our LaunchDarkly.

[edit] here's a shot of our dogfood instance: https://twitter.com/jkodumal/status/717786744750477312