Hi Schimon,
The spam you're referring to got through after the recent server crash and the subsequent restoration of the list. Nobody is "allowing" these messages: the list is not moderated by hand, message by message. The volunteers who run our infrastructure are aware of it, and are working on improving the mail delivery problems that surfaced after the crash.
I understand you're unhappy about the closure of the jdev list. You're welcome to make the case for reconsidering that, but that is a separate discussion.
What I don't accept is the suggestion that the people keeping these services running are unqualified, or that they should leave the XSF. They give their own time to maintain infrastructure that the whole community relies on, and they deserve better than that.
If you'd like to help, for example with spam filtering or list administration, that would be genuinely welcome. Feel free to reach out to me or the infrastructure team.
Best regards,
Guus