What is a mebers pin?

[Seagy]

Can onyone tell me whats a members pin?
Im lvl 75 was member before.
But whats a mebers pin what eveyone sels?!
Tell me please:eusa_danc

[Swearwolf]

you send a text message to rs and they send back a pin number and you trade that number and the guy/girl who buys it types it in and they become a member for 1 month

[Seagy]

for 1 pin? and were i need to fill that in?