Operations with futures and options in general are much cheaper than same operations on the stock market, because stock exchange commission is lower and there are no indirect costs (such as depository commission, payment for leverage etc.)
Fixed “Risk-Priofitability” Rate
Using combinations of options allows to make positions with fixed “risk-profitability” rate. At the very moment when position is opened, it is clear which will be the profit and maximum risk for the moment of option exercise date.