English Most bookmakers are extremely negative against surebets and surebet players. At the least suspicion, they can place restrictions for a professional player, for example, set the maximum bet to $1 or completely ban your account.
How do the bookmakers realize that they are dealing with a surebet player, not a common player? Fractionate bets like $20.58, regular withdrawals of funds from the bookmaker's accounts, betting on smaller events and youth tournaments. Sometimes the bookmakers make "traps" with apparently high odds for an event and blacklist anyone who has bet on it.