As of right now:
- Each separate account must purchase a separate license
- Each account is limited to one concurrent device
I believe in the near future, we'll be launching an option in the store to enable additional concurrent devices for account (up to a max of ~5 I think). These are primarily intended for families, where spouses and/or children often share accounts for convenience.
It's possible that we have other unannounced plans for the future, but BJ will have to comment on that.