1- TRUE, all casinos with scamming reports worth more than 300btc+ doing that (this case is 38btc, there is other case for 300btc for the same casino.
So yeah, all the scamming casinos doing that.
You added "scamming" after the fact. Now you're adding "300btc+". I bet you can narrow it down to a specific scenario that justifies you in your own eyes, but what you said to that user on telegram was just that "all casinos do it" (i.e. demand "bribes") and that is simply false. Unless you would like to prove it, in which case - go ahead.
2- TRUE
3- TRUE
Same as above. Not all scamming casinos or "platforms" do it, if any at all. I've seen a few scammy exchanges demand extra deposits. Perhaps that's where you got the idea for your shakedown scheme.
Everyone here is so blind how he was not even interested paying 0.1 for 38btc which makes me think his scam report is fake
You were unable to explain how you would get the 38 BTC back so of course there was no reason to pay 0.1 BTC. Even with your post-factum explanation it still doesn't make sense. If your actual undisclosed-at-the-time "plan" was to talk to the scammers and not really pay the "bribe" then you had no plan to get the 38 BTC back. Refusing to pay 0.1 BTC indicates that the person you were talking to was likely smarter than you and/or thought you're a scammer, but it doesn't say anything about the 38 BTC claim itself.