This is difficult for such centralized exchanges or gambling sites.
There are some gambling sites that are accepting some cryptocurrencies such as XRP but after the deposit success, you need to convert it to some coin or token that is within their platform (but this is kinda less scenario), most are; if you deposit XRP, you still can use XRP to bet within gambling platform.
(.....)
My local wallet ( Coins.ph ) have announced that they will not be responsible in Flare Token distribution, so we need to withdraw from coins.ph and put it some platform that will do the opposite.
This is one of the reasons why centralized exchanges or wallets are not good, you can blame them if they don't support the distribution of airdropped token, since, in the first place, they already own your coin after you deposit on their platform, "not your keys, not your coins".