We do house cleanings of our Division Structure every month. We remove people from the clan for inactivity at these times.
If you have been removed and have lost your member status in the forums, do not fret. Get in touch with us via PM here in the forums and we'll see about getting you back into the clan. Returning to your old rank is not guaranteed, depending on how long you have been gone and who speaks up for you. But all former members who have left or been removed are welcome back.