If you deposit at a gambling site then you should think what you deposit is already a lost that is why it will help to take some stress out if you really lose them all but if you make a little back then withdraw them and keep it safe until you decide to deposit it back to the site
This is a superb strategy.
Yes, if you have enough money and you can afford to loose some of them then this strategy can be work but make sure to withdraw the profit immediately. As per me its not possible to avoid the losses, there are wins and losses and its a part of gambling but in the long run people always loose their money.