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No need for what purpose?
It's not trading activity buy & sell (trading), it's only conversation asset from one to another based the asset you have. They will required have mostly 5% fee from the exchange, these feature is not new at all.
Because some of other casino have these.
I did some more searching and i stand corrected. Most of the ones i had seen were just ones where you can buy cryptos with your credit card, which isn't really an exchange. It's a one way purchace.
Others were just using third party services for converting them. I haven't dug deeper what tech those exchanges that i just found with converting possibility were using for it, but i believe it could be internal conversion.
But saying that it's not trading activity is a weird claim. Swapping/converting is just another form of trading. It needs liquidity as exchanges do (buyers and sellers), even if that liquidity is not visible.
I agree with you, any form of swapping or exchanging, no matter how small is considered trading, since it could mean that the user is expecting the other coin to rise up in price, that is why he or she is swapping and exchanging another coin for that one..
But going back to the first comment, I still believe that casino have the ability to integrate a small swapping system in there casino which to me, will not require a license to operate, there are currently several full fledged cryptocurrency exchanges that have been in the business as an exchange platform for years without license, if authorities are to go after unlicensed exchange, this type of exchanges are the ones they should go after, and not a casino that provided a small platform where their customers could quickly convert from one coin to another for gambling purposes, for the sake of convenience..
This is just my thought though.