There was also a rule:
To be eligible to compete in this challenge, you will need to participate in 3 out of 5 RMB Mini Monthly Challenges to nowcast monthly CPI values from April to August.
The leaderboard currently does not discriminate those who paticipated in less than 3 of the minis. Is this supposed to be so @amyflorida626?
Yea, just checked. I must say you got a keen eye ✅! Such a subtle rule that one can overlook. Hoping @Zindi team will look at it and correct.