An ex-Meta staffer testified that less than 1% of teens used Instagram's opt-in "Take a Break" tool when it launched; the feature is now on by default for teens (Madlin Mekelburg/Bloomberg)

Madlin Mekelburg / Bloomberg: An ex-Meta staffer testified that less than 1% of teens used Instagram's opt-in “Take a Break” tool when it launched; the feature is now on by default for teens — A former data scientist at Meta Platforms Inc. testified that less than 1% of teenagers were early adopters …