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 If bonuses or free bets are cashable, they can be withdrawn with the winnings after completing the rollover. 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 If bonuses or free bets are cashable, they can be withdrawn with the winnings after completing the rollover.