>>356425461
they were bought by 505 games and they were told to add loot boxes but they were taken out taken out in update #199 (feb last year) after overkill required the full rights. if you are interested you can read here.
https://payday.fandom.com/wiki/Safes_(Gameplay)#Removal_of_Microtransactions

Basically there isnt anymore but you can buy skins outright on the steam market.