What happened::
Found that site after researching this forum and for the good references seen.
In the begining all seems to be ok. I was able to deposit, place some bets and all without problem. They warn me that first withdrawal can take up to 48h and next ones within 15 min, it takes more than that, I had to ask for my first withdrawal several times but finally arrived. Later I've made more withdrawals and arrived in less than an hour. Ok, fine for now.
After a month, suddenly I cannot login to my page. Chat supports said to contact support by mail, and after doing the KYC they said that "Hello, your account is permanently closed, based on our terms of service with regard to arbitrage betting" and "As you have already received considerably more than your deposit in withdrawals, this matter is considered closed." On time on closure I've about 0.04 BTC

Their accusation is completely false, I never made arbitrage

Here is my track of the bets made, last week bets are missing because closure
https://imgur.com/xkEePAE
https://imgur.com/prsdWYb

Anyone can see that there didn't look arbitrage bets at all

• All bets are low stake, about 0.001 to 0.006 btc
• There are a lot of combo bets
• I's easy to find the odds of my bets and see that there was no opposite bet to reach global winnings

I've posted on their thread and the reply was the tipical of a spamer, user was violated the terms bla bla bla. The justification was so ridiculous that they deleted my next reply

Scammers Profile Link: https://bitcointalk.org/index.php?action=profile;u=562960

Amount Scammed: About 0.04 BTC
Payment Method: BTC deposit
Proof of Payment: b7272dfe65aae0602d27d3ee53fc3be2783cbad07945883863a507667c862252
PM/Chat Logs: https://imgur.com/hV6hpZv
https://imgur.com/sMKie1v