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 If bonuses or free bets are cashable, they can be withdrawn with the winnings after completing the rollover.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 If bonuses or free bets are cashable, they can be withdrawn with the winnings after completing the rollover.