~snip~
Maybe he received some free balance after creating an account and played with that, otherwise he played with deposits. Generally, credit doesn't mean free bet. The min bet limit is 3 μBTC in the ‘MMA LEGENDS’ slot game. If you click on your balance then it will show as credits. And 30 credits is equal to 3 μBTC, which is the base bet of that slot game. ‘serjent05’ got a 97× win on 30 credits bet and won 2910 credits. 2910 credits is equal to 0.000291 BTC.