Hey,
Why you wouldn't buy on site called G2A.com? or use AllKeyShop.com, it shows you all different sites and you can search for a game, if you do it will show you where is the cheapest.
Looking to get for cheaper price. Allkeyshop's cheapest one was ~80% from steam's price, looking for around 65%-75%.
I think playerunknown's battlegrounds just hasn't really been on sale often. You should maybe wait it out to get a lower price or something. But for what it's worth, bitcoin just boomed a couple of hours ago, so you might be able to buy what you want without heavily damaging your dollar amount of bitcoin.