They are barely profitable.

Massive revenue, tiny profit.

So, this makes their P/E ration quite massive and crazy as well.

Usually companies are based on the present value of all future earnings, kind of implying a P/E multiple of like 8 or 25 or whatever. Amazons is crazy high.

This is because it's assumed that Amazon could, at any time, start declaring massive profits, but they chose to re-invest instead.