can you use the skip intro code on any catagory extension and then add 55 sec to the timer or is it only allowed on certain catagorys

it's only allowed for the categories that it's mentioned in

But why? Is it because some categories are more optimized than others and that code could lead to an unfair advantage in the more optimized ones?

It is what it is. I didn't make the rules

ok thx for letting me know