As far as I can tell from reporting, there was no warning, and then they fired everyone and now existing projects have no point of contact, and nobody know what's going on. If I were in the middle of considering purchasing a car that relies on their network, I would have to stop and rethink. It's unlikely to continue to grow, but will it continue to operate at all?
The right way to do this, even if there's no notice, is to realise a big change is going to make a lot of noise and communicate what the plan is, and have a transition plan. "We believe the charging industry has become self-sufficient [put some buzzwords here], so we're pausing new deployments; sites that have broken ground will continue construction. If you have questions about your site, please contact your rep/some vp?. Maintenance will continue at our current standard of X% availability, with N day repairs for most issues. Our chargers will/will not be available for others to install." Add some congratulatory BS about how you developed the charging industry and now it's ready to be set free. If you really want to fire everyone in the team, I guess that's fine, but don't do it right away. Have them wind down the sites not started over a week or two, and consolidate down the project planning to a smaller number of people. If people would quit instead, offer retention tied to milestones.