Unfortunately, I have tested this in many different ways, but it seems not to work as described. If I invite someone with a Free account to a whiteboard and give them edit rights, they can only view, not edit. The only way it works is if I explicitly add them to my team.

In reality, without adding them to my team, they cannot edit. That’s why I suspect this might currently be a bug (or maybe a limitation specific to whiteboards?). Could you please check this again?
I’m very used to working professionally with Figma, and I have to say: Pixso is the best alternative I’ve seen so far, combining the strengths of Figma and Miro. The only issue is this one point, so I’d be very grateful if you could clarify.