Some crates (like the Fall Crate) are supposed to be a limited time item, set to disappear at a given date and time. Yet those that acquired the crates during the event and didn't log back in the game still have these crates in their inventory, and can trade them.
Provided that they would disappear the moment you log in TF2, is there any purpose in trading them besides collecting them? Is there still a way to open an expired Crate?
