You can get a bunch of 48 hour trials. lol http://www.xpgamesaves.com/topic/58720-tut-free-48-hour-codes-xbox-live/
1. go to store 2. put xbox live card in pocket 3. go home and enter code 4. free xbox live 5. police knock on door 6. don't drop the soap
The code wont work unless activated at the register, but I think you might be able to call Microsoft and complain about the code not working.
:LOL: And all you can do is use the 48hour method above enter the the codes on the xbox website and they go to 14days.