Obviously there are a lot of phishing domains for casinos too, not just for sites like mixers, though it's harder to pull off in the case of a casino.
I assume that other online casinos do not care about there users and that might be the reason they are least bothered. BC has been hungry to get more users who are unable to access the casino with this simple approach. They have been successful with this technique as most countries continue to ban their original domain.
If you go through the thread you will see a few who are from my country who were unable to access BC games. Whereas I was able to get access, which means that it was a good initiative by BC to come up with multiple domains.
Well, having alternatives to any thing is always an added advantage which whether it's a business or company; never will regret.
And let me say this, That users of other casinos sometimes get phished by the player mistakenly visiting a clone site or version of the casino without their knowledge does not necessarily mean that such casinos don't care about their users, because for as much as I know, online service providers never will get enough of users, Binance for example already has more than 200 million /registered active users, and yet, I still see their ads on various place and platforms.
The truth is that, different casino platforms have their different ways and approach to which they run their business, and glad that this approach, or strategy rather; is working for bc.game.