Endless Journey should have a limited bank box. No bank box is a bad idea.
Not having a bank box is really silly and will create ill will among players who want to try it out. the Facebook comments show as much. Just limit the amount of stones/items an EJ bank box can hold. Make sure it's reasonable enough to be usable, but limited to the degree that any enthusiastic player will soon enough run into storage problems and consider subscribing. That's the way other games do it.
A qua lemmúr wíste, an zen anku vol verde wís.