The thread that you are bumping in the
Service Announcement is subject to that indicated in the above posts, and specifically under the spell of the Mini bumps and Super bumps described in the referenced links, and subject to your Base bump power.
Since your have not earned any merits over the last year (see
https://public.tableau.com/shared/QWS9FC4WD?:display_count=n&:origin=viz_share_link), your Base bump power is effectively 0, since it is calculated as:
<…>
Base bump power
Your base bump power is the smaller of these two values:
- The activity you would have if you'd signed up 1 year ago.
- The merit you've earned in the last year.
If it's zero (as it will be for newbies), then you don't bump at all.
Therefore, you really don't have any bumping power, and if the threads manages to bump slightly, it’s probably because the other threads are not doing any better, meaning that the last post time comes into play.
Bump score
A topic's bump score is affected by the above two actions over the last 36 hours. Each action's effect decays linearly over the 36 hours, so an event which contributed 1 at the beginning will contribute 0.5 after 18 hours.
Topics with equal bump score (such as topics which haven't been posted in for 36 hours) are sorted by last post time.
Note: Read also the part related to Mini bumps and Super bumps, but having no Base bump power as I stated above, means that these currently do nothing in your case towards the Bump score.