In many cases we assume the multiplier of 2 times from what I see. One example is in NNT
Another example of common sense is
here
Not everyone makes right decisions. Sadly, the rules are overlooked at times.
Not that I know either case well enough to say with certainty if it's a problem.
But why on earth would it not be considered a multiplier? That's what I want to understand. It's basically a hierarchy of levels where the top level is completely invincible and unbeatable to the lower, they are basically invulnerable to anything. Hell, to say that level 100 is at least 100 times stronger than level 1 would actually be pretty generous.
I mean, first, lets document that the levels contribute nothing. It's just an easy way of saying who stomps who.
So what's the problem of applying random multipliers we come up with to people stomping each other? Several.
First, we have absolutely no idea how higher the stomping multiplier is for the series or if such a thing exists. In some verses a character can still fight an opponent x10 as strong, while in others a x2 stat gap is a stomp. This stuff varies between verses, so applying random multipliers we conjure from nothing to it isn't appropiate.
Second, authors rarely really keep track of this stuff so it is recurrently inconsistent, to the point that I don't buy it being consistent without any evidence.
Third, and perhaps most importantly, as the page states:
The reason for that is that it allows characters to be evaluated as significantly more powerful, without ever demonstrating that degree of power in a confirmable way.
It's pulling stats from pure conjecture with no actual evidence and void of absolutely any feat on that level. What you're suggesting is only marginally better than "he should have that stat, because I feel like he's strong enough to have it".
That gets especially bad if you consider that a verse that runs long and has repeatedly defeat characters each other over its long run can basically upscale immensely above any actual feat it has.
And that's why you need actual evidence to upscale characters.