Final answer:
The location of a 'Happiness Moment' is the least likely data to be included in the user rankings on the Snappy app's leaderboard, as it is more relevant to the app's map feature.
Step-by-step explanation:
The data least likely to be included in the rankings of users on the leaderboard for the Snappy app is the location of a 'Happiness Moment'.
The leaderboard is designed to highlight the most active and popular users, typically showcasing those who have submitted the highest volume of 'Happiness Moments', the quantity of ratings received, and perhaps the level of engagement through comments.
However, the specific location where a 'Happiness Moment' was captured is more relevant to the map feature on the app rather than to the ranking of users. Users become 'snappiest' by the volume and rating of their submissions, not by the geographical diversity of their photos.