Thanks to Discourse’s user trust levels, we have a discrete way to check which contributors are literally levelling up thanks to their participation in Wikimedia Developer Support. This is a topic to praise them.
Members, aka user trust level 2:
Let’s have a round of applause for the first true members!
It was great to hear the positivity at the Dev Summit about the future of MediaWiki as a meaningful and widely-used software product — and it’s active forums and support that make that possible (amongst other things, of course).
Is the user trust level automatically promote by system?
As far as I know: yes
Yes, and let me expand the link in the first post:
AIUI trust level 4 is distinct from moderators (even though both are assigned manually and have similar features).
FYI the level can be automatic or an admin (see here) can also manually set it. Level 3 can also be locked so that the user can never be demoted.