[naiwenwt]

> By license I mean the current Leetcode interview process except you do it once and are good for at least five years

Some companies do seem to be offering something similar to this, see CodeSignal's general coding assessment or back when TripleByte was big a few years ago. I think the problem is that even within the specialized topic of LC style interviews, many companies don't agree on a similar strategy when it comes to types of questions and difficulty. There isn't one standard that every company agrees on, so most have their own flavor of it.