It's good if your gambling site makes you quit gambling, but i'm not sure how it'll help other? everyone wants to make real profit that's why folks gamble, the only motive of gambling is profit and fun for some.(those who are in for fun can utilize your site)
50 btc is a lot to lose

, when and where did you lose?
I lost 50btc from the 90 btc profit i made. I walked out with 40 btc (which could be 90btc) and from there on I understand that greed is built right into everyone brain. I won from PD
Yes, it is the greed which have looted every person in the field of gambling. A person who once win a game he thinks to win again and again and in that way his/her greed make them lose all their wealth.
People gamble because of greed. They have an initial plan that if they win 1 btc then they will stop, but if that will happen they still long for another 1 BTC that's is why in the long run they lost. Just base on my experience, I won BTC in a day and came back the next then lost it all including my entire bankroll. You just follow your goal set and then stop, it takes a lot of discipline to be profitable in Gambling.
In relation of the subject, you cannot quit in gambling if you influence yourself with another form of gambling. The complete way to quit is to stay away from it.