It is very easy to accidentally click on the advertisement button when adding kp to a research tech. Yeah, you can decline to watch it, but it's annoying, frustrating and distracting to have to deal with that.
Not that INNO cares. That's why they moved their diamond buttons around recently too.
Sure, no one is forcing us to click on an ad button...but they are cheesy, in your face and against what a lot of players want to see.