When you write text, it often doesn't work by itself.
An infographic or a image that sets the tone is necessary.
Also, when explaining things (like this weeks contest) you need lots of graphics to do a good job explaining.
Almost all my images are my own creations... so never copyright.
Although, i think i had some removed for being close to the actual object.
all good points
I tend to steal my graphics from the internet, but I do make sure the source is either part of the graphic, or linked