If the exchanges can do it, why can't the casinos do it? But it also makes sense that if this is just for public viewing, like what Stompix said, that it can be faked and done for the sake of trust and confidence, but the reality is still different.

However, if it's the government or the regulators that are going to ask them for that so that there can be verification with a government agency so they cannot fake it out, that will make sense.

But this time, the trust is more of the reputable casinos even if there is no need for them to show some proof of bankroll or reserve. Maybe for the newer ones, this could be a thing for them to get the trust of the public and their possible customers.