If that bet won, I don't think you'll be here complaining.
It's you fault anyway for not checking the balance and you knew yourself that you have some bitcoins incoming. You should have exercised caution when you did that max bet. If you did get a faucet claim of 50 sats then it should have been added to your 0.14416387 which should have totaled 0.14416437. But your bet did not show that. You seem to have missed that.
Basically, you did not prove any point here nor have proven primedice and stake.com as a scam. Also if you did not know, primedice and stake.com are operated by the same operators, having the same support doesn't mean they are a scam.
There would be no such complaint to be made if those balance been double with just a mistake and he would definitely tell talk to himself that "Phew! im lucky on this day" .
Since when and based on what laws is it a scam to use the same support team?
I dont know what kind of mentality he do have when he do consider to be a scam of sites having the same support team. I cant even think up on where on the world he do get that idea.