Insane ? Thats a small amount and should be consider as a change for some whale gambler. I could name 3 other site right now that I saw with my own eyes where the player won alot more in one night. It is not something remarkable but atleast if the player managed to cash out from there then that would be a better for advertisement
With the current market price that money is quite a lot for many people in this world.
We can't force other people to cash out or spend money again on gambling. It all depends on winner what he wants to do with that money. FJ just mentioned that one player won so much money in their casino and give some ideas what and all they can do with that huge winnings.