Yes, you can, and it will really give you a pretty good amount of real money. In fact, you will not have to turn it over multiple times, as you would have to do with the bonus money, so from the moment you win this money, it is yours.
You can receive free spins as a welcome bonus or as a random bonus in any of the slot games. Also, some free bonus codes offer bonus spins as a gift. And of course, avid gamblers who are working with the VIP program will receive free spins when they achieve a new level.