Online Gambling and faucets platform like Freebitco is one of those whales today, I am sure many people have more platforms in mind, especially gambling platforms, aren't we just enriching these people? This is why I hate using Bitcoin to gamble today, it's a waste of valuable asset.
There’s no guarantee that they will hold only all those Bitcoin lost to them since they need to pay operational expenses on their employees and other expenses needed to run their website including license.
They are business so they need to cash out some profit for their own expenses that needed to be paid in fiat.
OG casino owner is surely rich because they accumulate a lot of Bitcoin back then on their bankroll.