there is also other option if the user's tier above you demoted and you are the next to be promoted then that spot will be available to you.
Perhaps you did not read entirelly what I wrote?
You can advance to an upper tier if these conditions are met:
- you are the oldest user in the campaign, on your current tier group (inside the Sr. Members group, in your case)
- an user with same rank as yours, participating in the upper tier, leaves the respective position, leaving his spot free (either if he gets promoted, demoted or leaves the campaign).
And about
BTW you can only be demoted if you are inactive for 2 weeks time.
This is not entirelly true as well. You are demoted for "failing to meet the minimum post requirement for two rounds" (consecutive). This means you are demoted if you don't have at least 15 accepted posts in two consecutive weeks, not that you are demoted
just because you are
completely inactive.
Being completely inactive in 2 rounds gets you demoted as it also gets you demoted if you have just 1 (eligible) post, or 2, or 3, or 14. The correct condition for demotion is on campaign's first page and quoted here as well, with " ".