You may have noticed that when you arrive on the Ulule homepage or on the project discovery tool, the basic filter is the "popularity" one. What does it mean?
That’s simply projects that have had the most different supports in the last 48 hours. This score is recalculated every hour, automatically. This calculation is totally automatic, the Ulule team has no influence on this popularity score.
The more people your project has who support it over a short period of time, the more likely it is to have a high popularity score during the 48 hours following this influx of support. It's up to you to get a lot of support in a short period of time and thus have a high popularity score for 48 hours!