Well, things just happen eMTe

Calculation is a bit confusing though. Posts have minimal affect on points. Suggested and accepted (and uploaded) games have larger impact, multiplied by game hunter's rating. Also each different suggested file gives points.(If for example you suggest game: "killer curiosity - cat's revenge to coyotes" but give only windows details and scythe later gives info about linux and mac versions -> scythe will gain some points too. Or if you suggest game with windows, linux and OSE versions, then you'll get points for a game and 3 different files). Reviews give points too - depending on review rating. More accurate details are in this thread AFAIR (some pages ago).
And no. this was not discussed too much - someone did a dictator action...
Now also the ranking is based on points. It is also possible to choose from 2 (untill Dotty finishes third) ranking options. Those are explained in some thread in feedback or suggestion box forums (some sticky thread would be good though

). At the moment the selection of ranking system is done by PMing to me

I will do the 'select your ranking tree' option in user panel - when I'll find the time.