Why the wait?

Well... because.... No... sorry cannot find any reason...

Maybe in the hopes that you will spend more money while you wait

If i had to guess i would say it's because they wan't people to be in the game for a longer amount of time.

I would assume this is the reason for tournaments being a timed race of who can attack the most and get the most points in a certain amount of time rather than an actual tournament where people have a certain amount of battles/attacks.

Because otherwise you could lock up 1st place for at least 25 minutes

What first place dyakoff? Their is no first place in challanges