Depends on the volume since for example
https://coinmarketcap.com/currencies/betfury/ if they have 3.5 billions plus circulating and they burn few millions of token on some time then it will take a long time for people to feel that scarcity and even if there's burning of tokens happening many people didn't feel any effect of this actions done. That's why this actions is not appealing to investors anymore and they should find another solution to increase the interest of investor to accumulate their token. People want nowadays change and mostly people always seek for utility and better exchange where it listed that's why BFG and other casino coin didn't get much attention from a lot of investors.
Hopefully SHFL will be still in good situation. But also I think devs know how to make a move to catch the interest of people since for sure they already scout the other casino tokens and provably perform more better than those which came first.
You can't really compare Betfury to this. They have different mechanism, as they are not buying the tokens from the market. Their team has a certain amount of tokens that they hold themselves, that are allocated for burning and that's basically it, apart from small amount of tokens lost by users by gambling.
So their casino revenue won't affect to price in any way. And since those tokens wouldn't have ever hit the market anyway, it isn't really affecting to scarcity. You can pretty much reduce the future burns from the circulated supply (as they aren't circulating). This way you get more realistic higher marketcap, and you see that has room to drop in price.
But that's $BFG... And $SHFL has none of these problems. I feel like i am over-praising Shuffle team but they did a really good job on that. Token value will be reflected directly by revenue.