Don't think it was. I let my sub lapse for about two weeks because I was busy with work. Logged on once or twice just to see what Preferred was like and my ~210 Daily comms were reduced to the cap of 175. Upon resubscribing I still only have 175 Daily comms.
Put in a support ticket though I don't know if they can or will restore the lost comms. Even if they do we shouldn't have to submit a ticket to recover items were earned while subscribing.
Went from sub to preferred on 24th and in my inventory/ currency tab i saw daily commendations 176/175 - I spent 150 and 26 remained.
Maybe, i am just an exception.