First of all, just want to mention that you are the guy who does the most amazing and full, detailed and very structural reviews of crypto casinos!
According to bitcoinfees.earn.com the fastest and cheapest transaction fee is currently 102 satoshis/byte, in your case that would result in the deducted amount of fee, i.e. 0.0002 BTC.
I usually don't use the fees that are provided by Blockchain.com Many times when I used their calculations, I ended up receiving payments after multiple hours or even after a day. But... But right now, fees from them are right, just checked on a lot of websites and right now in order to get 2 input/output transaction confirmed in 60 minute, you have to pay 15 satoshis/byte.
Seems they are taking information about fees from bitcoinfees.earn.com ?
I also believe that paying a little extra so that you could withdraw from casino is a very important thing. You could wait for it from some other person because you could chat with them and ask how it is going or check blockchain if it is gone and so forth, you could do that from an exchange because you can see it there and you know what is going on and it is riskless.
But, when we are talking about a casino I feel like we should be very careful about it, like take your money out of a casino as soon as possible the moment the you want it and you should be getting in a minute or less. The reason for this is that the longer you linger the more you may end up spending, so pay a little more but get out right away.