https://phabricator.wikimedia.org/P30584 shows the mean count of Wikibases per user is roughly 3.8, median is 2, of which the majority of the top 10 have less than 10. Outliers are the top 2 with 87 and 13.
AC:
- Limit the amount of Wikibases per user to 6 (as is the majority) to allow for testing cases as expected from the waiting list users.