I assume you are referring to the [Missing Maps Leaderboard](http://www.missingmaps.org/leaderboards/#/missingmaps).
There is a [contact page](http://www.missingmaps.org/about/) with a lot of differt channels to get in touch with the people behind that webpage.
As you might notice from the comments, this leader board focusses on only one aspect, quantity: the more buildings ones traces, the higher ones get in the ranking. This is by far not the best ranking metthod. Quality of data is by far more important. If you limit yourself to tracing buildings, good quality tracing takes more time than just dropping a few rectangles on a canvas.
All too often aerial imagery is outdated or interpreted incorrectly leading to incorrect data.
Furthermore quality, which involves detail (infrastructure, amenities, etc.) cannot be derived from aerial imagery alone.
So enjoy tracing building, but perhaps concider to go outside in your neighborhood and do a survey. Collect information that cannot be seen (or not be seen very well) on aerial imagery and map that afterwards.afterwards.
You might have come to the project (Missing Maps, HOT), because of the humanitarian aspects, which are less pronounced in mapping your own neighborhood. But imaging a flood, huge fire, earthquake, during which emergency helpers need good quality, up-to-date maps, so updating the map in your neighborhood is humanitarian as well.
