https://www.gamespot.com/articles/rainbow-six-siege-pricing-revised-standard-edition/1100-6456344/

With Rainbow Six Siege's third year of content approaching, Ubisoft has once again updated the ways in which you can buy the game. Although there will still be a budget-priced option for those simply looking to get into the door, the company is doing away with the Standard edition of the game, which may result in an increase in price of the PS4 and Xbox One versions. [Update: In response to concerns from players, Ubisoft has announced further changes to how Rainbow Six Siege is sold.]