Again I present another example:
If I deposited 4mbtc and accepting the freespins bonus. Spin through the spins and win the maximum amount allowable by the bonus and then clear the 40x playthrough, despite this incredible achievement I would actually have less money than I deposited. I would have only 3.3 MBTC but I deposited 4 MBTC.
This shifts the favor in advantage of the house by such a high amount that the game is nearly impossible and should not be described as gambling st all. It's either purely for entertainment and not really gambling or its a scam that used magic tricks to calculate their players balances.
Again. No other casino operates under these corrupted rules and calculations. It's asinine.
This is why I always think twice if I think the bonus terms are confusing but I always ended up not playing through them because in my mind, I will only get busted without getting that tiny amount of bonus. Better if I will play the normal way because there are no commitments on it and there is no limit on how much I can win and withdraw.
The house always has the advantage, this is why it's called gambling because you will be needing an extreme luck in order to win on them but it can also be entertaining because you won't know if you will get lucky or not but the most important aspect of all is that you must be willing to accept your defeat.