I apologize to open a topic just for this question.
I believe this is somewhere between 5 and 7 millions worldwide but I have no idea where to find the best estimation produced in VGC, if we have one...
Current PB on Secret of Mana remake : 2h27 (2nd)
Strongest worldwide achievement on TGM : 1st European S13 rank
Fastest TGM3 MASTER in Europe : rank Master V in 5min10
Western record on TGM3 EASY : 1484
Current PB on Power Ranger (Game Gear) : 10min06 (World Record)
Non-geek activity : ThermalHungary