How to get the destiny beta nameplate?
You do not receive this nameplate until you purchase the game when it is released.
Quote from the Bungie Weekly Update - 07/25/2014
Everyone who makes an appearance will earn a nameplate to help you prove that you were there when the record for concurrent players was set before the launch of the game. It will help you to be a rare and unique snowflake when Destiny launches in September.
This is what it will look like: