The question were replied in the other topic OP created.
Dear players,
We are a new casino, and we have to face a lot of challenges at this time. One of the problems we're facing is the faucet abusers.
It's a category of users who create hundreds or thousands of accounts, and take free bonus to set a maximal bid (all in), and once they win they repeat it until they have the amount for withdrawal. And although the chance for such win is 2% for each bet, the abusers have ways to do hundreds or thousands of bet simultaneously, which negatively affects our business.
We are constantly working on development of our project, and the recent features is the anti-fraud protection.
The system begun freezing withdrawals from users that made several bids with maximal multiply on funds received from our bonus program. The system flags these users as obvious abusers, and it been successfully blocking abusers from our game without any complaints from their part.
As the system was implemented, some time have passed, and the faucet abusers have adapted. After a series of successful bids and winning enough to withdraw, they made a small deposit to their balances. That way they have passed the anti-fraud check from our system.
For some time that worked, that the faucet abusers were withdrawing unfairly received funds.
Very recently we improved our anti-fraud, which lead to creation of this topic.
As our data shows, the player which created this topic is one of the faucet abusers, which withdrawn funds by abusing faucet.
Starting from FEB 11, this account regularly received bonus from faucet (our limit is once in 30 minutes), and were placing all in for x3-x4 miltiply. In case of success that account were placing all in with the same multiply.
On 18.02.2020 at 07:27:24 UTC the account makes series of all in wins, and receives 0.011 BTC on the balance. That happened on 88th bid after taking faucet 55 times. The bids have stopped after that.
At 6:41:49 there is a deposit of $20 equivalent in BTC to this account.
The deposit have added to balance on 7:21:15.
At 7:27:22 begins a series of bets with 98% chance and very small bid. There was 727 bids only 43 of which had chance of 47%.
At 8:27:45 there was a last bet, after which the withdrawal request were created.
Since our system marked the account as suspicious, it was frozen for manual processing.
We decided to decline the deposit because of following reasons:
1. At the moment of deposit there were more than enough funds for withdrawal, which makes us think it was made to throw off our anti-fraud system.
2. After making a deposit, there was an extremely large amount of small bets.
3. The network of this account is used in hundreds of other accounts.
4. This specific IP address were used on many other accounts which were withdrawing with faucet abuse.
5. This specific IP address is same that is used on faucet abuse account, and the game behavior of that account is same as on the other faucet abuse accounts.
Conclusion:
The deposit were made to try bypassing our anti-fraud system, since it worked previously.
The $20 deposit was sent back to this player, although he obviously were caught abusing our bonus system.
Problem is resolved.
