I do agree with you!
Human r most vulnerable :)

An simple que in auditors mind will be :
What if both have different lengths ?

But In Rust, the zip method only iterates until one of the iterators is exhausted.

here comes the problem! :
Here, the third element in payouts (30) is ignored because multipliers has fewer elements.

'Zips up' two iterators into a single iterator of pairs.

zip() returns a new iterator that will iterate over two other iterators, returning a tuple where the first element comes from the first iterator, and the second element comes from the second iterator.