I think the reason isn't the lack of community support or the fact that the casino is not ready to spend a huge amount on listing. Personally, I think the point is that any gambling token might be an "inconvenient" token for centralized exchanges because of various restrictions from regulators.
Regarding Betfury, the listing on CEXs has been discussed here many times, and I think it is obvious to all users that the Betfury team isn't interested in listing BFG on CEXs at the moment.
It's not the reason or main reason if you know a fact that centralized exchanges in last two or three years have been becoming very surprisingly "friendly" with meme tokens, and if you know that many meme tokens are accepted on gambing sites too.
I of course am not a lawyer to understand about laws and regulations, but I think it is almost the same, again let's say it's in my stance, if you launch a token for gambling purpose initially then expand it with more use cases, and if you launch a meme token for some non-gambling purposes and later it expands to gambling use case, it's not much different.
I surely don't know about what lawyer will say in these opposite cases, but with me I see them as nearly the same, and centralized exchanges can list gambling token if they want.