It does work your chest more, thats why some people do it.
But it puts your shoulders in a vulnerable position. I would recomend doing it. But if you feel any discomfort in your shoulders, stop immediately.
I vary rarely do them. Because of the delt strain and I have good shoulder flexibility.
Take your hands and put them on opposite shoulders. Raise your elbows up as high as you can. If you feel any pain, don't do that exercise.
Shoulders are the one thing you don't wanna fuck with. If you mess them up, you may never recover.