With Ma you make an investment. You then wait for an hour and ten minutes, sitting through a whole lot of nothing. Finally, after the long haul, you get some pretty fun deaths. Only some. Only because you've been starved of anything they are so gratifying. After the temporary orgasm of murder, the post-sex murder joy, you realise it wasn't that good. You check your balance to see your profits at the end of the film, and you have made a 0.03% profit. What a waste.