When banners are not shown for the highest priority campaign, but other campaigns are active, the selection logic continues down the list of active campaigns. If it eventually chooses a banner from one of the other campaigns, that banner is logged in the impression data in turnilo with its status code. If it gets to the end of the campaign list and the chosen banner is still hidden, only that final banner will show in the turnilo data with a non-'shown' status code.

Fundraising campaigns are run at the highest priority, so the selected banner for that campaign will only show up in the Turnilo data with a 'hidden' status code if there are no lower-priority campaigns available to use that page view.

Ever since The Wikipedia Asia Month 2025 Global campaign went live (CN admin says start date 11/1 but impressions begin to appear 11/8), there has been a lower-priority campaign available targeting all of the readers targeted by the WMF_FR campaigns. So while that's still up, any WMF_FR banner that ends up hidden is not logged to Turnilo with a 2.x status

Looking at a graph of status codes in general, with no banner or campaign filter, we can see that there are still plenty of 2.x ones being logged: https://w.wiki/GTHt

@AKanji-WMF ^^^ is an example of the fallthrough that would be disrupted by serving the donor badge as a CN banner. Note that a logged out user on en.wikipedia.org who closes the fundraising banner will see a banner from Wikipedia Asian Month on their next pageview. If they hide THAT banner, they will see one from Wiki Science Competition 2025 on the following pageview.

I just added a new section on the wiki page explaining this behavior: https://www.mediawiki.org/wiki/Extension:CentralNotice/Statuses,_reasons_and_status_codes#Where_did_the_2.x_codes_for_the_high_priority_campaign_go?

Thanks @Ejegg - just to note I have seen this and will discuss with @spatton

Closing this task as explained. Created a new task for adding the 'first campaign status' field to the turnilo cube: T414478: Add 'first campaign' and 'first campaign status code' to CentralNotice banner_activity_minutely Turnilo cube and Druid source table