Bankroll U is currently available to United States citizens, with availability varying by state and product. This means you can participate as long as you are a United States citizen (even if you are traveling in another country, for example).
Battles are available in all states except:
Washington (WA)
Nevada (NV)
Challenges are available in all states except:
Idaho (ID)
Louisiana (LA)
Nevada (NV)
Washington (WA)
California (CA)
Michigan (MI)
Players from all states are required to go through a KYC process.