To answer my own question in title:
I am receiving current sign payments directly to casino, and I have spent some. Because why not?

What about you?
I think the issue of payment to the casino site account does not matter much here, I myself am constantly receiving signature campaign payments from jackclub to my jacklcub account, but I have wagered very rarely here with this account. Rather if there is any need for that I have created another account but I have wagered very little with this one.
And besides, I think it's also a matter of self-control, and at the same time I also think that gambling is not a crime, most of us here gamble more or less. But we have to remember that it should be beyond our control to lose, then whether it is given as a signature payment or in some other way, it doesn't matter.