I dont agree with the x2 more xp, free stat reset and more. Gold and silver ninja shouldnt get anything that affect the pvp/or any aspect of the game related to player interactions. It is unfair and become a pay to win.
The only way I could see forum ranked ninja get more reward for supporting the game is with art. More customisation with you character per exemple, a second slot for accessories, the ability to equip vests as t-shirts and more. (ex : jonin vest + another vest on top.)
We already get a cool color name, the ability to change name and discounts in the cash shop. We also had an early access to both alpha and beta. (Back then it was pretty neat.)