Scruffy nerf herder
Toaster Loving AdMech Boi
yeah... I doubt anyone has good numbers through 2e and maybe even early 3e for how many people played... so that 50 million estimate always strikes me as odd... like at one Point a guy I used to know talked about his first game being at college (I was just born that year BTW) and it was with half the rules cause it was a photo copy someone made of a pamplet going around his school... no one can count those games.
Heh, there's always going to be the No True Scotsman thinking floating around with regard to who all plays and whether what they played was D&D, but you have a point. It's just not clear what the size of the active player base is.