Someone recently asked what is good about vaults...
well if one of your accounts went to Endless Journey, you can pay the 300 sovs and be able to pull out the items you want out of their bank box without paying the subscription price...
for myself I'm thinking about doing it for the fact that, Cinderella is my resource gatherer
I always put the leather in my bank box & gems with other resources I leave in various spots
then I have to log onto my crafter & take it all to her bank
the vault would eliminate all that running back and forth
(I keep my resources in my bank cause I tend to forget where I put them otherwise, still can't find my iron ingots & I've been looking lol)