im so confused

I was playing and I saw my friend join me and they said they liked my house and I offered to build them something similar and so I did but when they gave me perms they said they had 1 billion of bloxburg cash and I thought they were joking but they literally did, it showed up as 999M+ and im just so confused as if this is even possible especially since they didnt look like they played the game a lot and they had no gamepasses (at least not the basement, advanced placing, multiple floors or premium)?? I'm so confused rn lol