Are they useable by every toon on the account? Like if I earned them on my bear, can I spend them with my bird if there both on the same account? If I earned on 2 separate characters on the same account do the event currencies on both toons add together to get my total amount?

Also, what are we supposed to do with our leftover currencies once the event is over....? Are they going to be reused next year in the same event or maybe we could convert the old ones into the current event currency at a 2 old for 1 new rate?

Lastly, does the new crate keys pack work on past boxes/chests/crates/etc...? Meaning can i buy a freedom chest and open it with crate keys?