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.
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, some player wins with 1 million multipliers:
https://bitcointalk.org/index.php?topic=5221321.msg55435981#msg55435981Nothing was impossible.