While I was waiting in matchmaking queue with a friend, I was looking at locked skins I didn’t have yet. While I was actively typing a message I must have pushed the correct combination of hotkeys to unintentionally purchase the characters skin. The focus must have been on the chat and the game because the message still typed, but as I typed it quickly selected buy, and “OK” for the confirmation message. I believe it was Group chat I was typing in. Thanks!
Well this is coming back to bite them. Kotaku just referenced this in their article about how it’s happening in the live game with ingame currency.