Pro artists and designers would likely have to tender for work anyway so entering into a competition is hardly that different.
If they are good enough to enter, they should be paid. This is exactly what is wrong with people doing competitions for design - no value on the work created.
In fact, no personal malice intended, but your whole post is a joke. I know this isn't a real project, but the idea that you would get any sort of quality from such a cheap trick is a joke. Would you go to a 3 different bike shops, get them each to fix your bike, and then say,
Oh, I'm only going to pay one, as they are the best, sorry guys
If they are good enough to enter, they should be paid. This is exactly what is wrong with people doing competitions for design - no value on the work created.
In fact, no personal malice intended, but your whole post is a joke. I know this isn't a real project, but the idea that you would get any sort of quality from such a cheap trick is a joke. Would you go to a 3 different bike shops, get them each to fix your bike, and then say,
?