He won the same sized bet like this last time, I wish it was PR because he won 83btc last time if i remember correctly

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so this is the same person as the last time?
but i just wondering how much the maximum bet that stake has? because right now i just try to make the same bet as his but the max bet i got just under 5 btc
AFAİK, the recent terms&conditions refer to 8
BTC limit for potential profit in single bet. You can read more on the forum of Stake.
But then how did they manage to bet 50btc on a single bet? Are they excluded if they have a diamond vip membership maybe? Or they just
recently changed the terms and conditions after they placed this bet 5 hours ago?

Profit limit was never 8
BTC (at least for sports), and there's nothing in the terms and conditions that states a max profit. I'm guessing that user has highroller limits to be able to bet 50
BTC, but it wouldn't surprise me if a new account was able to profit more than 8 BTC in certain markets/leagues.