Finally a topic where i could share my views....As mentioned above Gambling itself is risky & offering loans to a gambler is even higher risky business. So comes the interest of 10% per day on the principal amount. As in any other investments if the person who gives a loan sticks to some stringent rules & diversify his portfolio making profits isn't that hard. But again two possibilities of getting into loss are if we come across a huge defaulter or if we start gambling with the amount we earned by giving interests.
First possibility is a dead end while second one has the chances of earning again as every other member has.
First possibility can be taken care of by lending only less amounts, asking for a collateral, making use of escrow services, never be so greedy about interests etc.
Now coming to the point of the person who takes loan making profits is never a guaranteed one....