I'm not entirely sure how this works but I would think the developers of BattlEye decides and develops what it reacts to and not the PUBG developers? Why else would you use a third party solution?
I see they are used in quite a few games as well : https://www.battleye.com/ (including PUBG's main rival).
Interesting. Maybe my disappointment in PUBG got me to be a bit more biased than I should :).