Just out of curiosity, what wheel did you spin? Gold, silver or bronze one?
Judging by the information he provided, He is certainly use the Gold spin since 600 spin is only available on Gold spin. You can refer to the terms below for the spin structure.
Quote
10. The list of rewards that can be won in Gold Wheel of Winz: 100 FS, 200 FS, 400 FS, 600 FS, 800 FS, $40, $100, $200, $400, $5000.
11. The list of rewards that can be won in Silver Wheel of Winz: 50 FS, 100 FS, 200 FS, 300 FS, 400 FS, $20, $25, $100, $200, $2000.
12. The list of rewards that can be won in Bronze Wheel of Winz: 25 FS, 50 FS, 100 FS, 150 FS, 200 FS, $10, $25, $50, $100, $1000.
11. The list of rewards that can be won in Silver Wheel of Winz: 50 FS, 100 FS, 200 FS, 300 FS, 400 FS, $20, $25, $100, $200, $2000.
12. The list of rewards that can be won in Bronze Wheel of Winz: 25 FS, 50 FS, 100 FS, 150 FS, 200 FS, $10, $25, $50, $100, $1000.
You are right. In this case Sunderland was really unlucky : he won the lowest prize available and judging by the content of his post it seems that those FS have not given him decent winnings.
Im using WOW bonus which the max depo is 0.004 BTC/$100 at that time while the Gold spin needs 0.008 BTC as the minimum deposit.
That bonus only available for the user who never deposit/play on Winz and I was registered there last year but never do any deposit except withdraw the money I won from the mascot contest.
Also I continue play with the deposit and got the lotteries ticket, too bad the luck still not on my side either this time hehe.
Well, its gambling - sometimes we lose sometimes we win.
... anyway myself, even knowing this already , when I play slots or other games where balance is updated ahead of game animation end I cover the balance with my hand or something else to enjoy the thrill ( I know it sounds dumb but it is what it is 
).
