BetSul Welcome Bonus and BetSul Promotional Code Registration Withdrawals February New Zealand. Is BetSul a reliable company or is it a fraud? How does it. If they are non-cashable, only winnings are. If they are non-cashable, only winnings are. . If bonuses or free bets are cashable, they can be withdrawn with the winnings after completing the rollover. If bonuses or free bets are cashable, they can be withdrawn with the winnings after completing the rollover.