Brand New:   0 posts, gets 1 gold coin under his name.   
Newbie:   (none), gets 1 gold coin under his name.   
Jr. Member:   Activity: 30, gets 1 gold coin under his name.   
Member:   Activity: 60, gets 2 gold coins under his name.   
Full Member:   Activity: 120, gets 3 gold coins under his name.   
Sr. Member:   Activity: 240, gets 4 gold coins under his name.   
Hero Member:   Activity: 480, gets 5 gold coins under his name.
   
Legendary:   Activity: the Legendary membergroup has no universal activity requirement.
You are guaranteed to become Legendary somewhere between 775 and 1030 activity,
but the exact point in this range at which you become Legendary is random per user.
Gets 5 gold coins under his name of which the last is half dark blue.