Wow, I have never encountered such and I am just getting to know about this for the first time, such an option is absolutely bullshit if you ask me, and using money laundering and mixing to excuse such option is another bullshit, peeps should be free do whatever they want with their money, why force me to gamble if I changed my mind  after depositing into your casino? Makes no sense to me....
If I know such casino, I will never use it, it's as simple as that.