1st:
Well if you looked around on the marketplace of this forums, you can see people selling Steam accounts (4 digit / 5 digit / 6 digit etc < These definately are 2003)
2nd:
The only thing I can think of is Idling in-game, looking around on these forums u will find some scrips (Coding and Resources subforum) with the keyword "idle".
(This for example: LINK)
3rd:
I think this belongs in the Discussion subforums