Yeah, I think you may be right. This might be a one-shot deal.
We know Moss is the top option, so at full strength, he'd see most of those balls. Moss' injuries might be worse than they are saying, or they felt the game was in hand. There should be no reason that Moss only gets 3 or 4 catches in a game. The same thing happened to Moss last year when he was playing while injured.
Of course, if his injuries linger, we could have a Burleson situation from last year. If you have room, he might be worth "stashing."