But when do you switch bets? At 2x, 3x, 5X? How many spins? 25, 30, 50? Anywhere in there it could trigger. There's no point where upping the ante is apparent.
And let's say you go max at a high mult, high free spins because you're comfortable with the fs total mult and number - you could still go through several deposits and get a poor return before triggering it. Ok, so you go at it again...and it triggers early..ok, so you go it again..high, mult, high spins, max it out..and get a poor return again. Unless youve an unlimited bankroill, how do you guarantee youd recoup? Isn't that rather like martingale - unless youve an unlimited bankroll and unlimited bet, you could go bankrupt very fast. And maybe you finally do recoup...as a hundred other players didnt, balancing it out.
As I said, I really don't know if spins compensate or not. I just don't see why they'd need to.