Is this the normal quality of isolate photo processing for shutterstock?

Question

Photo

What is the best way to separate images from the background?

Answer 1

1. The shadows of the wires break off a bit abruptly.
   How to separate - there are many ways, techniques and tools.
   For example, take a copy of the channel, where the greatest contrast is along the border of the object, and work with it with levels, self-overlay modes and brushes in different modes. It is more convenient to cut long smooth shapes with vector "paths" (paths).

Answer 2

The background has areas with a color close to white, but still not white.
Near the object, this is normal, but at the edges it should be pure 255,255,255.