If you are a business, and you want a piece of art work for some commercial purpose, it is tempting to stage a competition. It looks like a good way to get to choose the best of a wide range of offerings, while paying peanuts.
What it is in reality is a cynical exploitation of emerging artists' desire for publication.
You're asking a whole lot of people to do a whole lot of unpaid work in the hope that you might reward them with a handful of beans and the publication of their work somewhere.
How about you actually put in a bit of work yourself, do some research, find artists whose work resonates with you, and actually commission them to do the job? There are a multitude of sites on the internet that are ideal for seeing a huge range of talents to choose from. It would be more honest, and less exploitative, to source your commercial artwork that way.
You might retort: Well, what about the EXPOSURE?
To which I reply with a hollow laugh.
