I'd rather spend those $100 to buy free spins / bonus rounds with sticky wilds on certain slots then having 1000 times rolls at $0.1 though.
According to the bible:
In some games, you can use "buy feature" to immediately trigger the bonus level.
...
(4) You can use the martingale strategy to buy features, but keep in mind this is like high-roller stuff. You can lose all of your money if you are unlucky.
Therefore, it's not recommended to use the buy feature except you guys have balls of steel. Moreover, there's debate about this feature in terms of responsible gambling. But it's a personal preference, spent $100 in three minutes of bonus level or hours of regular spins
