Messaging software firm Slack plans mass-media push to boost growth

By Eric Auchard DUBLIN (Reuters) – Slack, the group messaging platform valued at nearly $3 billion, plans to accelerate its growth by spending some of its $250 million cash pile on mass-market advertising, founder and CEO Stewart Butterfield said. “We are switching from trying to keep up with growth to trying to generate growth,” Butterfield said in an interview at Web Summit, Europe’s biggest conference for start-ups

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