Depends both on how you define "they" and "make". PUBG Corp has made roughly a couple of billion USD in revenue, but definitely not a couple of billion in profit. (The 2018 numbers were $920M revenue, $311 in profit.)
But also, that's PUBG-the-company, not PUBG-the-game. The distinction is that the PUBG mobile version (with tens of millions of daily actives) is by Tencent, and PUBG-the-company gets some kind of licensing revenue from it.
But also, that's PUBG-the-company, not PUBG-the-game. The distinction is that the PUBG mobile version (with tens of millions of daily actives) is by Tencent, and PUBG-the-company gets some kind of licensing revenue from it.