Facebook + Amazon Store = Commission Allowed ?

I have been reading on this forum that facebook traffic is not allowed on amazon.
My Question is:
1. Is it allowed ,the traffic from facebook to your amazon store where your affiliation link is , then from there to amazon.
2.Is it true amazon now only keep cookies for 24hours ?

please clarify this for me before i start on wrong journey

Cant help with the first question but yes the cookie is only 24 hours.

Yes, most shopping sites provide cookies for just 24 hours only. and yes , according to my knowledge, it is allowed by facebook.

Check these Amazon TOS for traffic from social networking sites