https://www.gamespot.com/articles/star-wars-battlefront-2-removes-microtransactions-/1100-6455042/

It looks like big changes may be in the works for Star Wars: Battlefront II's microtransaction system. It was discovered today that you can no longer purchase the game's virtual currency, Crystals, with real money.

Accessing the Crystals purchase page on Xbox One today yield the screen below. It does not give you the option to buy Crystals. However, you can still purchase them through the Xbox.com store, at least for the time being.