Have anyone actually use or try "Audio MODEM" plugin? i skimmed the code[1] and it seems it require you to have both speaker and microphone.
What does it do? I could not accurately find a use case for this plugin in the source code that you've linked.
Does anyone know if there are any conditions for listing new plugins?
I noticed there is an option for Community-built extensions for privacy, which means that it is possible to list some Coinjoin plugin.
I guess the main one obviously is that you have to make a pull request or something like that to that particular repo, and that it has to pass peer review and safety checks et al.