Working photographers love when they have an image posted, but it has now become the standard to not give credit on images especially when it comes to social media and websites. Credit is a nice pat on the back, plus it shows the difference between your work and a interns or non-professionals photographers work. Also, that doesn't mean that you give the company credit and not the person that created the image. It should go to both.
Give credit to the artist... More important than that is to pay the artist for the work they created.
More important- Pay the Artist!
Photo: Kent Smith/Kent Smith Photo and Video