Slot machines are survival games, as long as you have money your game session survives. There are many elements to gambling, hazarding some amount of money is an important, but not the most addictive part.
Of course it's silly. I think the game is great and fun (and ... humans can get pretty enthusiastic about fun games ... to the point of putting off other things so they can play said game ... oh noes!), and Play/App stores are their own special hell, so best wishes for the devs, yet ... I think the policy applies to this game. (And likely to others too as you point out.)