From where the commission to me comes from if my referral plays a free roll?
Whenever your referrals play the free roll, you are awarded a commision by freebitco and that's added to your balance.
Three great places where you can get your questions answered are the BitcoinTalk Forum at BitcoinTalk.org and Bitcoin Stack Exchange at Bitcoin.StackExchange.com.
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The answer includes 2 places. Thus why there is stated three in the beginning of sentence?
I think there were three websites mentioned there before. they removed one of them and forgot to change the "three" to "two".
If I am not wrong, the third one was a link to reddit and I don't know why they removed it.