A free spin is essentially an offer that a casino gives to its players to spin the reels free of charge and have the opportunity to win real cash. The free spins may be given to both new and current customers, and it's one way to reward and encourage them to continue betting.
Russia is the birthplace of vodka, and it still produces the best "little water" in the world. Restricting gambling is a policy priority in Russia, as the fall of the Soviet Union saw the emergence of a black market for games of chance. Currently, mobile online gambling is illegal and international sites are actively blocked.