Yes, deposits are credited immediately (0 confirms) and the promo/bonus is also added automatically (together with the deposit).
If the user cancels the transaction using RFB and promo had credited, are they still available playing the bonus?. are you have time for monitoring all transactions?. you must to know Electrum wallet had a feature for canceling transaction (0 confirmation)
Yes, they still have both the bonus and the deposit amount (even cancelled) to play with.
Yes, we are aware of the potential of a transaction never confirming (as you describe, and also with double-spend "exploits"). And yes, we have had some unscrupulous users attempting to take advantage of this.
The way we avoid loss is to make a check at the time of withdrawal to ensure that all that user's deposits have had 4 or more confirmations before the withdrawal funds are sent back to their wallet. This we have found (and had positive feedback) is the best balance between giving access to the user's deposit immediately, and preventing dishonest individuals from stealing from the system.
Thank you for your feedback!!
great to see that you are active again in your thread here. such abuse will always be there and there will be users that will try to take advantage of such feature. this is the reason why sometimes you will see complaints from users who thought they were screwed by the site but it is the other way around.
by the way, with almost 3 years that you launched your casino in this forum, by any chance are you working on your gambling license? because with tough competition, this will be your one edge for players to trust the site. at least for those new players.