As far as I'm concerned, you gain your Full member status in a couple of days, and if you keep going, soon you'll be a Hero Member.
Also, I wasn't involved in this Recruit thingie, I just gave ideas
I think your recruit period lasts 2 weeks, then yo can take off the sign to give a signal that you became fully an {XG} member. Also, try to play hard, and good, since you'll need some good kdr photos to be promoted :p