Hi, recent discoverer of this forum and an Israeli here.
Some notes about the prevalence of luck tasks at the end of legs:
We in Israel have a tendency to root for the underdogs, whether it be in a reality show or otherwise - as we can personally relate to them on some levels. Luck tasks bring a fun twist to the legs, as they help underdog teams such as Tali and Gili or Nisim and Orel catch up and pass some teams.
Besides, luck tasks are a way to spark some drama. If a team sees a team which yielded/U-turned them in the final task, there's usually a lot of tension between the two as they race to finish the task and to reach the pitstop, which can lead the yielded team to "break" if passed by teams which yielded them.
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Also yeah, Tata, there will be a detour next leg. Between some sort of a task with armadillos and bananas, and a task with turtles, it seems?