That's true.. though you could also look at it the other way which is that they didn't capitalize effectively enough to stay competitive with Asana. The niche is not always a safe place to hang out.
As much as I love not having to see Trump on Twitter now.. the future of social media is going to be fully decentralized and distributed (whether we like it or not). The Free World will need a much better immune response to this kind of radicalization than deplatforming people.
CEO is the primary but everyone in a startup needs to take responsibility for this. The core goal of a startup is to discover a "scalable and repeatable" business model.