It's hard to bypass a ban when you have to supply your banking information. Not to mention, going through intermediaries of proxy betters likely starts to venture into the realm of things that can land you in court.

With lots of money on the line you're probably not going to trust strangers with this, and the corporate bookmakers aggressively search for "duplicate" accounts (might vary in different jurisdictions but in Australia at least you need to provide full name, date of birth, address and government issued ID to play and withdraw - you can't fake that and you'll run out of trusted family members before too long).

Right you have to give intermediates a cut and yes they require social security numbers so hard to clone accounts but in age of discord proxy betters are readily available

We've already started placing the bets across a dozen or so accounts to bypass this. That wasn't the point of the story.