How if you keep on winning and doubling your $80k profit? As you have said yourself that it is pure luck game, you cant prove that your account is flagged and adjusted to lose just because you lost what you have won before. Nothing you can do except accept the fact and blame yourself for not stopping after you made decent profit.
Do you know how to read? When you start winning they flag your account. This isn't a quick martingale on high bankroll. These are small batches of bankroll put in play over hundreds of thousands of rolls.
No casino marks the gambler's account after getting a win.
If after you win then keep playing and all your winnings are gone because losing is not a casino crime by marking your account to lose but it was caused by your own greed which chased even bigger wins.
Obviously, many gamblers tell of experiences when after winning you experience consecutive defeats because you are greedy and when you start being greedy with winning games you will be careless and don't care about strategy anymore.
this is why all of us gamblers who have had a lot of bitter experiences always advise not to be greedy and have to be able to control ourselves.