Each upland treasure is 15 minutes of non-stop treasure hunting action, on a timer, to see who can find the most treasures in that allotted time.
For the Brooklyn rush today I started the rush without even realizing that I had run out of funds to keep spawning new treasures. After I had already started the timer I had to stop, move to another website where I rent out my spark and make a withdrawal. In the meantime I had just enough to run two hunts and after each one I was forced to open the treasure chests to get the UPX inside which you normally try not to do until the end just to save time.
After my deposit came in from the spark renting website I was able to keep hunting and still find 16 chests but I was also extremely lucky that some of the usual solid hunters struggled in this city. Brooklyn really isn't the easiest of cities to hunt in which gave me just the luck I needed to still walk away with a nice UPX prize and place top 50 to secure the 0.01 spark reward that comes along with placing.
Rush has become a strong even for me and one that helps me make some additional earnings!