I trust that the program I download right now won't do anything malicious with my files.

I don't trust that the organization, or whoever it gets sold to in the future, won't try to monetize my email address, from now until forever.

No, that's actually an indicator. If the DMG is email-walled, how much data the app will track once installed on my machine?

To be honest, the initial launch of Marta was an important lesson for me. I started with a closed alpha so I could fix the critical bugs until it will become open for everyone – not because I want everyone's emails to send some shitty spam. But lots of people disagreed with me, and I understand them.

I changed some of my plans. Marta will become open much earlier, maybe even the next week. Sorry for the inconvenience.

Thank you for a reply and best wishes to your project!