Again, if it is a performance award - fine. You pay the same whether person is hurt or not. Tackle for loss whether it is a starting QB or 6th string RB is the same.
I don't think VT's interest in a player has any relationship to guys that get hurt. Do you believe Foster would look at a DE who twists ankles/pokes eyes/late hits QBs as being more valuable than a guy who doesn't? That is an honest question. Remember the outrage at Marcus stomping a player? He wasn't taken out of the game but I doubt a coach gave him a pat on the back let alone a monetary reward for that crap behavior.