Zulip being fully open-source and self-hostable helps this. It's what the Bluesky team have been calling "credible exit", and Zulip has it way more than Bluesky does.

On the other hand, I would love to see more tech companies being co-operatives, where their members get a say in governance. That'd be the ultimate hard-mode for a business that was dedicated to being rugpull-resistant.