questions

Sorry im sure this has been asked before but I couldn't find it. Thanks!

increase kudos and increase EXP

Ok thank you that's what I thought.

It also affects which bot hits first. Some relevant commentary from a few years ago:

Third of all, maybe 1 int isn't the right answer for bots trying to be as strong as possible. It's long been assumed that a point in int is a point wasted (for bots aiming to battle). The final two experiments show that even just 1 extra point of int can make a measurable difference if your opponent only has 1 int - in this case, you get to hit first 66.6% of the time instead of 50%.