Board Thread:Game Discussion/@comment-2606:A000:5188:E500:5422:AF8A:69C0:6579-20171212162454/@comment-31167576-20171213124613

It is based on the highest number of teammates for the whole duration of the team challenge. For example, if you have 15 teammates, and 2 left the team before even finish. Then your rewards will get divided by 15.