Ok. Redo.
This^^^ got changed from steep to wide.
Just to clarify, the more towards obtuse the facing, the smaller the "make" target is. Generally, anything less than an obtuse ball entry into the facing will bounce into the other facing and at speed will send the ball into a standing wave.
Grazing the rail on the way in can work to a degree by generating running spin that becomes reverse spin at the facing. This has at least two pertinent effects. The reverse spin will diminish the ball momentum, slowing the ball into drop speed and should the ball make it to the second facing, any residual spin will now be running spin. ie into the abyss spin...
If the shot is carrying too much speed and spin, it can enter the "standing wave" zone and rattle infinitely...
Diamond (hallowed ground evidently) has did the matt to make sure you can slam it down the rail.
Pro Cut:
Marketing.