Yes — the editor you already know. What we remove is the hosting, the updates and the plugin maintenance.

No. Everything the sites need is built into the platform theme, which is why nothing breaks on update night.

Export it in the standard WordPress format and take it anywhere. The domain is yours either way.

Any time. Links and search rankings follow through a permanent redirect.

Only the accounts you add to it. Each site has its own users, media and settings.