I call that a ten-second target.
These bonus targets are just targets that you can elect to not shoot at, and not receive a "P" for the stage. But, if you're competitive, you have to shoot at them or you put yourself at a disadvantage.
Incidentally, that's why the "buy a miss" tickets were done away with at the larger matches... because you could
buy an advanatge. Again, if you were competitive, you
had to buy that miss ticket. It was extortion.
Anyhoo... back to the "bounus" targets. You could argue, "But what if you miss it? You've added the time to make the shot on to your raw time." That's true. But what if you don't try... and everyone else does?
The only time it makes sense to not shoot an optional target is when you know it's going to take you more time to shoot it than it's worth. And, in that instance, nobody will shoot it.