What happens to EAD when the primary quits job?

[murthyuser78]

I work for company A who did my GC. I have EAD and AP and my PD of Dec 11, 2006 (EB3-I). I want to take a break from work.

1. What happens to the EAD when I quit the job (note that I am not switching jobs but quitting work altogether)? Does it become invalid? How does USCIS track this?
   
2. Can I keep renewing the EAD even after I quit the job (since the paperwork does not ask for any work related papers)?
   
3. Can I join back work (for another company B) on EAD after taking the break from work (say 6-8 months break)?
   
4. What happens when my PD becomes current? Is there a chance to still get the GC (if there are no RFEs)?
   

Your input is very much appreciated.

Thanks.

[JoeF]

Nothing happens to the EAD.