So I lay black and back red or lay red and back black. Use free bets but double the stake every time I lose. I think I'm onto a winner here. Martingale here I come.
Fair play to you but I'd rather lose at betting than play golf....
Out of interest what is the investment over 4 years that the average annual 16.2% is derived from. Must be an annual 6 figure sum and surely that must alert a few bookies.