Remember Bustabit guys? I have several known persons who gambled there in the past and got lucky (or I don't know what trick they did but they earned big and I saw it). Their big winnings were cashed-out almost regularly until coins.ph noticed that activity. I even saw withdrawing BTC0.05-BTC0.1 every 2 to 3 days. That was really alarming so coins.ph asked for some details and those users say it came from "gambling" then you know what happened next, account frozen. I don't remember what happened next from there.
May tawag sa ganun... hahahahaha.. pwede naman sabihin remitance from other country, or mining (kasi mining naman talaga where it all comes from) ... basta wag mo sabihin galing sa sugal na laro.