Sometimes we may not want to move a given card SKU from a container to a deck permanently, maybe this is a temporary move (replacing proxies in a deck with real cards for a sanctioned tournament and then swapping them back to proxies when done), or we may be loaning out cards to someone.
In this case, we want to be able to mark cards as being [exchanged / on loan] in some other deck and be able to track these temporary exchanges.
Sometimes we may not want to move a given card SKU from a container to a deck permanently, maybe this is a temporary move (replacing proxies in a deck with real cards for a sanctioned tournament and then swapping them back to proxies when done), or we may be loaning out cards to someone.
In this case, we want to be able to mark cards as being [exchanged / on loan] in some other deck and be able to track these temporary exchanges.