How do i get Credit and what are the differences between member groups?

It's hard to understand but I think you just have to be active but not fake active. Seams okay with me.
 
I am just new here
i would like to say Hello to every one,I will follow the rules
 
these translations are actually awful and really hard to understand. credit system doesn't seem like it works very well. need to just up the stuff for free (like vfxmed) and stop trying to get money and credits involved