It is a whole package of those benefits, the free monthly games are not there to sweeten any imaginary spot they are part of the benefits. (blog.us.playstation.com)
The game with the most votes will automatically be included in our future monthly games line - up. (blog.eu.playstation.com)
Then the votes will be counted and the chosen game will be available as part of the PS + monthly games the following month. (stevivor.com)