At which point everyone would know how much volume they're doing? And if Coinbase or anyone else who's tracking gambling transactions to deny people business got one address they'd suddenly have a bunch of others? That seems like it's not a very good idea.
That doesn't make any sense. They are already sending transactions...it doesn't matter if they are sending 50 individual ones or one to 50 addresses, if they are being tracked they are being tracked and if someone wants to figure out the volume, they can figure it out.