User blog comment:Raised By Wolves/CYOA: Total Drama: Revenge of the Island - Eat, Puke and Be Wary/@comment-11883116-20161202023630/@comment-5231983-20161202031709

Because while it's a competition, in the case of TDI, TDRI and TDAS it's still also a summer camp. Giving the 3 day gap in between challenges gives it more of a summertime feel, along with giving the campers a chance to rest in between challenges. It's a week in this episode because of the intense storm, though.