How well is any one game doing? Can you trust what you hear? This video shows how someone can do the numbers yourself, while also showing how many popular games (and the ones I like) fare on the aggregate site BoardGameGeek.
The final tallies I come up with are not fully accurate to the relevancy of the game, as I explain in my video....numbers can be skewed.

NOTES:
--- FATAL is just on there for comparative purposes. it is not one of my favorites.
--- I left out Call of Cthulhu....man....that was my mistake.