I don't know if others casino can so that but I can only say what I'm sure about cause it something i have seen and it logical for every casino to pay the 3rd parties game according to the players multipliers but the game that bought this subject was crash which is the game operated by the house not the 3rd parties and there barely casino which can allow 200K plus multipliers.
If you talked about the multiplier crash who reached x200K, other casinos still can happen too.
Every casino using the same provably fair from SHA-256, so the same situation could be happening on other casinos too. Take one of the example from "CoinDragon" even not a game like a crash but still can be the same as crash because their game was X-Factor, some player successfully wins with 1 million multipliers:
https://bitcointalk.org/index.php?topic=5221321.msg55435981#msg55435981Nothing was impossible.
Not everyone has to gamble for the "as high as it gets" type of deal, obviously if you keep doing it forever (probably with use of an automatic betting bot on a VPS not to strain your pc) you could find few a day and hope that it profits you more frequently than your losses.
However I think 1.01 cash out is as legit as 1000x cash out, they are basically the same thing in my mind, both of them have the same idea that you are not going to make as much profit when you win as you lose because there is a house edge.
One of them constantly wins tiny and loses big in the end, one of them loses tiny and wins big in the end, all comes down to house edge of course. Hence, why I think there could be billions and billions in multiplier and as long as there is house edge it doesn't "sound" that different from anything else to me.