FYI, from the FAQ:
Why is Magic Earth free? What is the business model?
Magic Earth is free for all our end-users but we also have a paid Magic Earth SDK for business partners. For instance Selectric.de (a supplier for navigation solutions for ambulances and fire trucks), Smarter AI (developing ADAS systems) or Absolute Cycling (using the platform on bicycles). For more info on the SDK, you can check magiclane.com.
No web interface?
This setting:
Settings shortcut: Theme management > Highlight color
It changes the color of some elements. Mainly the community names.
It's nice to have the same settings for different profiles, but I set a different highlight colour to differentiate them.
But you can sign up to as many instances as you like with the same username and email.
But, like anywhere else, I would strongly suggest to use different passwords.
But it is perfectly normal to try to lower the risk of getting sued, even if the chance will never be zero.