I just liked that in sgm that anyone could get the rank knife and honestly the unranked knife looks the cleanest. I haven't seen much players using the rank knife so i don't believe this would take anything special away from those who are vip and up, And I know it wouldn't hurt to give players who haven't created a forum account yet another reason to do so.
(Could be cool to make it so those who have higher ranks get access to the colors that are below them as well)
(Could be cool to make it so those who have higher ranks get access to the colors that are below them as well)