I doubt casinos do hate big winners, if they didnt exist it would reduce their overall revenue which is where they pick up the profit just from averages not the idea of waging any war or even negative stance towards seperate players. If anything surely casinos want more notable winners so long as it also correlates to more custom, almost every industry its about the revenue and growth etc.
Casinos don't have an interest in individual outcomes. They just want people to wager because that gives them a chance to profit. This.
With enough users, especially with millions of them like on freebitco.in, all wins are more or less compensated by losses, and vice versa. A gambling site is earning from house edge, and, as @STT has rightly noted, is even interested in some players winning big because that would attract more users.
anybady know where i can see history of my WOF spin ?
Click on MULTIPLY BTC here

and then scroll down to see your ROLL HISTORY, like this

Btw, as you all can see, I won 5k sats on WOF today. Again!
