The software tracks the longevity of a piece of sales copy. I think that was a Claude Hopkins idea. A video may sell well. But the odds of the same ad selling the same video for more than 2 months are pretty slim....on average.

The lowest score I've discovered is for the name of a company in the UK that rents apartments. They have very short running ads.

That's why the software is only correct 85.6% of the time.
"Flash in the pan" advertising copy can be profitable too.
Some are good at it. Gliffius can still help with that also.