Rialto Casino provides legitimate bonuses. If you meet the set terms and conditions, you will be allowed to withdraw the bonus winnings. Go through the terms and conditions and meet all of them. If you have any issues or do not understand any of the terms, contact customer service.
Remember, the casino may remove the bonus at any time if you don’t follow the terms or if the validity period elapses before you meet the requirements. This does not mean that the offer is illegitimate.