I've just started playing Star Wars: The Old Republic and noticed that certain mission rewards seem to be locked and dissapear when I 'Accept' the mission end dialog. There's a tooltip that mentions subscribers but I can't recall the precise wording.
Are these locked rewards, which seem so far to only be credit lockboxes, only available to subscribers or can I get them by adding some Cartel Coins and becoming a preferred player? I've tried searching but haven't found a definitive answer only a lot of forum rage about lockbox gambling in general.
Secondly is there any way to recover these lockboxes if I become a subscriber or are they gone forever?