They do have one gambling token that is listed on their platform and it is
FUN token. I just can't remember when exactly they listed it. But you're right, they should not focus getting listed on binance. There are many reputable exchanges out there like kucoin or ftx. Once their token gets good trading volume on those exchanges and many people demand for binance listing, CZ will definitely notice them and consider to list it on their platform.
FUN tokens got listed on Binance quite a long time ago and way before they were taken over by freebitco.in. it is normal that everyone keeps talking about Binance as they are the biggest and most popular exchange.