It's surprising how a big token which currently at 241 rank on CMC, but they only listed on one unknown centralized exchange. While Fun token which currently at 718 rank on CMC are listed on many centralized exchanges.
Is centralized exchanges have a rule to not accept gambling token? Fun token branding themselves to be "gaming" token, not necessary to be "gambling" which I think it's the reason they were accepted.
Yeah, I believe known exchanges can be finicky to gambling platform's token. Another casino I know has been doing negotiations with tier 1 exchanges e.g. bybit about their token and these CEXes are said to be finicky with gambling tokens.
Lesser known CEXes should be easier to get into though. Since popular CEX -- the tier 1's esp -- get more attention and lesser knowns tend to be laxer.