Impressive UX work, and looks genuinely useful, but I'm always wary of storing any of my work in proprietary formats without the ability to export it in readable form. Is there export? If I were to decide to stop the subscription, in what form can I download my work, if at all?
Yes, you can export all your content as a .muse bundle — which you can rename to a .zip and unzip to get all the source data.
Also, even after your subscription ends, you will still have access to your content (and to the export feature) indefinitely. You just can’t create new cards (as long as you have more than 100).
It’s really important to us that your data isn’t locked into Muse, not by the data format and not by a subscription requirement.