Not sure what happened to Binance Playbread.com, but it seems like they might have shut it down or rebranded. Haven't seen any updates lately. Maybe someone else has more info or a new link?
Binance has never owned or partnered with any gambling casino, not one that I know of, and myself being someone that was here and witnessed the launch of Binance exchange, I can tell you that I am sure of what I am saying here.
And I don't also think op was referring to what I believe you assume to be a Binance owned casino, but rather, I think he was referring to a certain game named or possibly tagged as Binance playbread(or what ever it's called) by the casino where the games was listed on.
Like the comment above mine said, if Binance ever launched a game or a gambling casino, all of crypto industry will know about it because Binance is a really popular exchange and trust that such development won't be hidden from the public, since they will need the casino or game to be as popular as their exchange also.