http://boutcheetah.zylongaming.com/index.php?action=membershiplogin to the account you want to buy membership for (probably the one your posting from already)
select one of the options, voila. your a member.
Benefits;
1.) You can get level 200.
2.) You can equip items above level 150.
3.) You get 20,000 coins every Monday.
4.) You get a special color text in the lobby.
5.) You can request a bot/account name change through PM.
6.) You help us afford a better server =].
Theirs more stuff added, I just found this post of kennys by searching.
Can't find the membership benefits topic. But yeah you do get a bunch of extras.
..wow pig beat me D: