Hi again, @mickee.
As far as I can tell, to turn those announcements off you have to run the command that is mentioned in that previous message, but prefixing it with "sudo". Like this:
sudo pro config set apt_news=false
If that doesn't work, run "Software Updater" first, so it updates the "ubuntu-advantage-tools" package to the 27.11.3 version that seems to be the version of that package that added the support for that "APT news" flag:
https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/27.11.3~22.10.1
ubuntu-advantage-tools 27.11.3~22.10.1 source package in Ubuntu
Changelog
ubuntu-advantage-tools (27.11.3~22.10.1) kinetic; urgency=medium
- New upstream release 27.11.3: (LP: #1993006)
- d/postinst: remove the Ubuntu Pro beta apt message and set up the configurable flag for "APT news" instead
- collect-logs: do not fail if a file cannot be read (LP: #1991858) - config: add a flag to disable "APT news" (LP: 1992026)
- messaging: add announcement of "APT news" to apt output
- messaging: only show "APT news" when using apt binary (GH: #2288)
- version: use /run instead of /tmp for version file (GH: #2294)
-- Grant Orndorff <[email protected]> Fri, 14 Oct 2022 16:55:27 -0400
... and after running that update, run the command I've mentioned in the beginning of this reply:
sudo pro config set apt_news=false