>>mikece+(OP)
I'll probably donate, but I find it annoying that Signal only offers Linux packages for Debian-based distros. I've had headaches with the Flatpak. I would think that the Linux desktop audience - while not huge - would be the most interested in Signal. That is, might not be a lot of Linux users but percentage-wise I'd bet more Linux users are interested in Signal than macOS or Windows users.
Even an AppImage would be lovely.