Edit: These sites needs to respect their players : they take all the money of every player on their game and this is not good for thier own bussiness
If you invested 0.1 BTC in a gambling site does not matter which site it is and if you loss the bet your remaning balance is 0.00 BTC then still you cant say anything to gamblings sites as all these sites have one thing in commom in their TOS which is when you can double your money at the same time you can loss anything this is how gambling work, people here make money with them some loss money with them this is all about how you play it