It has nothing to do with registered date or anything similar, Beta testers atleast those that Im familiar with have worked on their own time to improve the game and the overall game experience, by reporting most of the buggs reported out there in detail and working closely with developers in resolving the same buggs, also countless chats and discussions with developers on possible tweeks and alot of other things. The list of things some of the beta testers have done for the game is quite extensive, I can not list them all becuase I do not have the knowledge what all of them did and I am not in contact with all of them. We are the if you may "front line" of testing in the game, we will make sure to submit detailed and complete reports in the upcomming mmo testing. Alot of us provided countless support to new players without being asked to do it, via forums steam discussion even adding on steam to help with ingame issues. We are very dedicated, atleast those I was in contact with and we are trying to help allways. So please my personal request is to not use things such as "WTF is Beta Tester"
So I repeat again it was given to us for countless reasons, it was not bought and no you can not request it, no new aditions to the Beta testers atleast for now as I know.